Answer:
1 and 2 are components of intracellular fluids, while 3 and 4 are of extracellular fluids.
Explanation:
The fluid in the body can be categorized as either extracellular or intracellular, based on the fluid component as well as where they are found.
Extracellular fluids are found outside the body cells, while intracellular fluids are found inside of cells enclosed by the plasma membranes.
1. cytoplasm of a neuron and 2. Cytosol of a red blood cells are components of intracellular fluids found within cells.
3. Interstitial fluid and 4. Blood plasma are primary components of extracellular fluids found outside the surrounding of cells.
The cytoplasm of a neuron and the cytosol of a red blood cell are components of the intracellular fluid, while the interstitial fluid and blood plasma are part of the extracellular fluid.
Explanation:The components mentioned fall into different categories of body fluids based on their location. Number 1, cytoplasm of a neuron, and Number 2, cytosol of a red blood cell are components of the intracellular fluid. This is because they are located inside the cells. On the other hand, Number 3, interstitial fluid, and Number 4, blood plasma, belong to the extracellular fluid category, since they are found outside the cellular structure.
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In each generation of this family after generation I, the age at diagnosis is significantly lower than would be found in nonfamilial (sporadic) cases of this cancer (~63 years). What is the most likely reason?
Answer:
Option B, Hereditary (or familial) cases of this cancer typically occur at earlier ages than do no familial forms.
Explanation:
Image for this question is attached. Options for this questions are -
A. Members of this family know to be checked for colon cancer early in life
B. Hereditary (or familial) cases of this cancer typically occur at earlier ages than do no familial forms.
C. This is pure chance; it would not be expected if you were to look at a different family
D. This cancer requires mutations in more than this one gene
Solution-
The cause of early diagnosis of this genetic cancer form is done in order to detect the risk and guidance to reduce the risk at an early stage. Being familial in nature, this cancer form occurs at an early stage in the family members as compared to its non familial form. Genetic diagnosis will help in determining the pattern of transmission asap and hence will help in determining the risk that an individual may face so that precautionary measure can be taken to suppress the problems caused due to this cancer.
The brain structure responsible for regulating behavior related to survival, such as hunger and thirst, is called the _____ and is part of the _____ system.
Answer:Hypothalamus, Lymbic system
Explanation:
The generation and experience of emotions involve many regions of the brain. The limbic system is one of the region in the brain that controls emotion, memories and arousal. It contains regions that detect fear, reinforcement behavior. The limbic system which includes the amygala, hypothalamus and part of the thalamus is dedicated to different functions.
The Hypothalamus also controls emotions, hunger, thirst, appetite, digestion and sleep.
The brain structure responsible for regulating behavior related to survival is called the hypothalamus and is part of the endocrine system.
Explanation:The brain structure responsible for regulating behavior related to survival, such as hunger and thirst, is called the hypothalamus and is part of the endocrine system. The hypothalamus plays a crucial role in maintaining homeostasis by controlling various physiological processes, including hunger, thirst, body temperature, and sleep.Learn more about the hypothalamus here:https://brainly.com/question/32900534
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DNA sequences can act as "tape measures of evolution". Some highly conserved regions of the human genome (similar to comparable regions in other species) don’t code for proteins. Why? Propose a possible explanation for this observation.
Explanation:
The DNA contains many regulatory sequences that are very important, even though they do not code for proteins.
For example, the expression of every gene is regulated by a region called the Promoter. The promoter sequence, located close by the coding region of the gene, usually binds the RNA polymerase (the enzyme that transcribes genes into mRNA) as well as other proteins necessary for transcription,
The promoter sequence, thus, does not itself code for proteins, but is essential for transcription and must be highly conserved so that the RNA polymerase can find it.
Answer: Those sequences do not code for proteins because the genes may be important and maybe should not be mutated. A mutation there could have a negative impact on an organism's ability to function effectively.
Explanation:
DNA transcription is the first process of gene expression, by which the information contained in the DNA sequence is transferred to the protein sequence using various RNAs as intermediaries. During gene transcription, the DNA sequences are copied into RNA by an enzyme called RNA polymerase (pRNA) which synthesizes a messenger RNA (mRNA) that maintains the DNA sequence information. In this way, DNA transcription could also be called messenger RNA synthesis. At last, that mRNA is used to make proteins in a process called translation.
Those DNA sequences are transcribed, but not translated because they are able to regulate certain mRNA strands by destroying them or blocking translation of them. So those DNA sequences are not used to make proteins, because a mutation there could have a negative impact on the organisms. Instead, those sequences may be used for other functions such as regulating gene expression by acting over other mRNA strands.
Which of the following is an incorrect statement about the inheritance of the ability to taste the chemical PTC (phenylthiocarbamide)?
A) The ability to taste PTC follows Mendelian
patterns of inheritance.
B) Any child born of parents who are able to taste PTC will inherit the ability to taste PTC.
C) Two children of taster parents can inherit opposite PTC-tasting phenotypes.
D) The non-taster phenotype is a recessive trait.
E) The inheritance pattern of PTC tasting differs from the inheritance pattern of hairline contour (widow's peak).
Answer:
B) Any child born of parents who are able to taste PTC will inherit the ability to taste PTC.
Explanation:
The ability to taste the chemical PTC (phenylthiocarbamide) contain some people who can and some people who cannot taste PTC. Despite the fact, this trait is often considered a simple Mendelian trait, i.e.one gene-two alleles.(a simple genetic trait governed by a pair of alleles).The reason why this trait has been kept going in the population is undetermined but polymorphism may influence food selection or nutritional status.
If we have two parents that are heterozygous for this PTC traits, if the cross, they will have the following types of offspring.
Let say; dominant T for tasting and recessive t for nontasting---- i.e Tt
If Tt crosses with Tt, we have;
T t
T TT Tt
t Tt tt
From the punnet square, we have the following offspring
TT (dominant PTC taster )
2 Tt ( heterozygous PTC taster)
tt (recessive Non- taster)
From, the foregoing, we can clearly see that the incorrect statement about the inheritance of the ability to taste the chemical PTC (phenylthiocarbamide) is Any child born of parents who are able to taste PTC will inherit the ability to taste PTC. This is because from the cross, it is not all children that inherit the ability to taste PTC.
Consider the following five infectious diseases: Ebola hemorrhagic fever avian influenza SARS West Nile encephalitis mad cow disease What do these diseases have in common?
Answer:
All these are emerging infectious diseases.
Explanation:
The emerging infectious diseases refer to the infections, which have appeared freshly within a population or those whose occurrence or geographic range is enhancing briskly or is threatening to upsurge in the coming time. The emerging infections can be a result of:
1. Known agents, which have dispersed to novel geographic locations or new populations.
2. Previously unknown or undetermined infectious agents.
3. Previously known agents whose function in particular diseases was not determined previously.
According to WHO, infectious diseases are emerging at a rate, which has not been noticed before. Since the 1970s, many infectious diseases have been discovered like Ebola, SARS, avian influenza, mad cow disease, and West Nile encephalitis.
With the individuals traveling much more to far greater distances in comparison to the past, encountering with wild animals, and living in more densely populated regions has caused the emerging infectious diseases to spread briskly and is resulting in global epidemics, which is a major worry.
Answer:
The correct answer is - these are emerging infectious diseases.
Explanation:
Ebola is an emerging virus cause Ebola hemorrhagic fever disease that is an infectious disease that infects the people by coming in touch with the infected animal or body fluids of other human or primates.
Avian influenza is also an infectious disease contracted by the contact of the infected bird and can be infected by the human cough sneeze. Similarly, SARS, West Nile encephalitis, and mad cow are the infectious disease that is emerging and infected by the various mode of infection.
Thus, the correct answer is - these are emerging infectious diseases.
Both sickle cell anemia and hemophilia:A. are caused by genes for defective proteins B. are seen in homozygous dominant individuals C. Provide resistance to malaria infections D. are sexlinked traits
Answer:
A. are caused by genes for defective proteins
Explanation:
Sickle cell anemia occurs when the gene coding for the beta chain of the hemoglobin has a substitution mutation. The mutant gene code for a faulty protein. The mutated hemoglobin forms aggregates and imparts sickle shape to the red blood cells carrying them. Similarly, hemophilia is caused due to mutation in the gene coding for Factor VIII. This protein is involved in blood clotting. The affected person has a deficiency of Factor VIII and experience severe blood loss even in case of a small injury.
Assume the diameter of the field of vision in your microscope is 2mm under low power. If one Bacillus cell is 2um, how many Bacillus cells could fit end across the field? How many 10um yeast cells could fit across the field?
2) Name two ways in which you can enhance the resolving power.
3) what are the advantages of the low-power objective over the oil immersion objective for viewing fungi or algae?
4) what would occur if water were accidentally used in place of immersion oil?
5) which controls on the microscope affect the amount of light reaching the ocular lens?
6) which objective focuses closest to the slide when it is in focus?
7) why is it desirable that microscope objectives be parfocal?
8) In Bacteria, Fungi, Protozoa and algae, which one is the largest organism, which one is the smallest?
9) how does increased magnification affect the field of vision.
1. If one bacillus is 2um, then 1000 bacillus could fit end across the field.
Also
200 yeast cell fit across the field.
2. Ways in which you can enhance the resolving power are
a. Adjustment of numerical aperture
b. Immersion oil
3. It helps you to get a better view of fungi or algae because they are larger organism
4. If water accidentally used in place of immersion oil the image would not be clear.
5. The diaphragm and the light intensity adjustment.
6. The immersion oil objective (100x)
7. Because you do not have to refocus the microscope every time you switch the lenses.
8. Protozoa is the largest organism while virus is the smallest.
9. Because you are essentially looking closer and closer at the object.
The study of a living being is called biology.
The correct answer is mentioned as follows:-
What is a microscope?The instrument is used to see the small organism which can not be seen by the eyes.According to the question, the answer to the first question is as follows:-
If one bacillus is 2um, then 1000 bacillus could fit the end across the field. Also, 200 yeast cells fit across the field.The Ways in which you can enhance the resolving power is by Adjustment of numerical aperture or by Immersion oilThe advantage of low power is It helps you to get a better view of fungi or algae because they are larger organismIf water was accidentally used in place of immersion oil the image would not be clear.The diaphragm and the light intensity adjustment.The immersion oil objective (100x)Because you do not have to refocus the microscope every time you switch the lenses.Protozoa is the largest organism while the virus is the smallest.Because you are essentially looking closer and closer at the object.All the answer is mentioned above to the following question.
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What inherent characteristics of populations did both Darwin and Wallace propose were need for natural selection to lead to adaptation?
Answer:
Darwin and Wallace both the naturalist known for the theory of natural selection. These naturalist have proposed various inherent characteristics that are essential for natural selection process to result in the change or adaption according the atmosphere.
The inherent characteristic is that the population must have variability as trait, increasing the competition by over reproduction and in a population some individuals are successful at reproduction.
Thus, the correct answer is mention above.
A type of neuron that stimulates action by conveying signalsto muscles or glands and initiating a body's response tostimuli is a(n):
a. afferent
b. efferent
c. sensory neuron.
d. interneuron
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The nurse is working with a client from the Middle East. The nurse maintains a distance of approximately 13 feet from the client while talking. The client says that the client is uncomfortable when the nurse talks to the client from such a long distance. How should the nurse interpret this statement?1. The client feels that the nurse is not doing the job properly.2. The client feels that the nurse is invading the client's personal zone.3. The client feels that the nurse is indifferent toward the client.4. The client is not maintaining boundaries.
Answer:
3. The client feels that the nurse is indifferent toward the client
Explanation:
Nurse would interpret as the the client feels that the nurse is indifferent toward the client
A sample of radioactive material has a half life of 20 years and an activity level of 4 curies. After how many years will the activity level of the sample be at 0.25 curie?
The activity level of a radioactive material decreases by half with each half-life. In this case, with the half-life being 20 years, the activity level would reach 0.25 curies after 80 years, equivalent to four half-lives.
Explanation:The subject in question involves the concept of half-life, a term commonly used in nuclear physics to denote the time it takes for half of a certain radioactive substance to decay. It's given that the sample has an activity level of 4 curies and a half-life of 20 years. The activity level after some years is to be 0.25 curie.
As a rule, each time a sample goes through one half-life, its activity level gets halved. So, from 4 curies to 2 curies would be one half-life (20 years), from 2 curies to 1 curie would be another half-life (another 20 years), from 1 curie to 0.5 curie would be yet another half-life (another 20 years), and finally from 0.5 curie to 0.25 curie would be a fourth half-life (another 20 years).
Therefore, it would take 4 half-lives—totaling 80 years—for the activity level of the sample to drop from 4 curies to 0.25 curie.
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Describe the genetic mutations that you think occurred in the cancer cells that were responsible for the phenotypic differences between the normal and cancercells you observed. The normal cells were organized, normal shape, and the cancerous cells were all over the place stacked together, multiple nuclei in one cell for some and a lot of them in on area. I think the genetic mutation that occurred would be with the gene that affects cell division and the tumor suppressor gene.
ANSWER:
Most types of cancer are believed to begin with a random genetic mutation. This is followed by mutations, which endow the cancer cells with properties allowing them to grow without normal controls to become a tumor.
Mutation is any change in the DNA sequence of a cell. Mutations may be caused by mistakes during cell division, or they may be caused by exposure to DNA-damaging agents in the environment.
Genetic Mutations that lead to cancer cell formation can occur in two forms:
1. GROWTH-PROMOTING GENES are commonly mutated in cancer cells, becoming SUPER-ACTIVE and producing cells that are too strongly stimulated by growth receptors.
2. Mutations can INACTIVATE the genes that suppress cell proliferation or those that signal the need for apoptosis. These genes are known as TUMOR SUPPRESSOR GENES.
A loss of 90% of the population in the Pingelap atoll from a typhoon in 1775 resulted in a high percentage of the current population being affected by achromatopsia. As a result, all of these affected individuals _____.
a. have normal vision
b. are descendants of one of the 20 original survivors
c. receive genetic testing and genetic counseling
d. have exceptional hearing
e. are descendants of the 20 original survivors
Answer:
Option-B
Explanation:
Pingelap is an atoll consisting of three islands: Daekae, Sukoru and Pingelap Island.
The present population of the atoll is 250 residents, the proportion of which has the color blindness called achromatopsia caused by the loss of the cone cells which respond to a different wavelength of light.
The achromatopsia on the atoll can be traced back in 1775 when a catastrophic typhoon swept the island and left only 20 individuals. One of these individuals named the Doahkaesa Mwanenihsed was the carrier of the disease and the inbreeding in the descendants of this individual resulted in the increase in the frequency of the recessive allele and is the cause of the affected individuals.
Thus, Option-B is the correct answer.
At what age are infants capable of demonstrating empathy for others, such as comforting and showing concern for others?
Answer:
At "24 months or 2 years" infants capable of demonstrating empathy for others, such as comforting and showing concern for others
Explanation:
When the baby becomes 2 year old they develop a genuine empathy, and have the ability to understand that what other people feel may be they are not feeling the same. We can also conclude that, the babies not only can understand the pain of the people but also try to pacify in their own way. The trait of the empathy develop in the baby through early development. When they gets their limbs combinedly, hence babies will try to reach them and try to soothe others in distress.
The client is an average-sized adult and has abnormal microcytic hypochromic red blood cells due to a long-term, chronic disease. Which complete blood count (CBC) result is characteristic of this type of anemia?
The TC DC ESR test gives this type of results.
Explanation:Anemia is defined as the condition of blood where the average sizes of red blood cells are smaller than normal, and the hemoglobin count is also low. The chronic diseases that are the causes are iron deficiency, chronic leukocytic leukemia, chronic myelocytic leukemia, hookworm infections etc.
As suspected, these patients are advised to do total count, differential count of blood corpuscles, erythrocytic sedimentation rate, haemoglobin count, blood ferritin levels etc which gives the corresponding results proving any of the diseases.
A mutant bacterial cell has a defective aminoacyl synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of the normal phenylalanine. The consequence of this for the cell will be that:_____________a) none of the proteins in the cell will contain phenylalanine.b) proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU.c) the cell will compensate for the defect by attaching phenylalanine to tRNAs with lysine-specifying anticodons.d) the ribosome will skip a codon every time a UUU is encountered.e) none of the options will occur; the cell will recognize the error and destroy the tRNA.
Answer:
Proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU.
Explanation:
Mutation may be defined as the sudden or heritable change in the genetic sequence of the organisms. The mutation can change the phenotype and genotype of the organisms.
The AAA codes for the lysine. The mutation attaches the anticodon AAA instead of normal phenylalanine. The aminonacids AAA will code for the lysine and no phenylalanine is observed in the cell as phenylalanine is coded by UUU and not by AAA.
Thus, the correct answer is option (b).
Which kind of media contains a dye or other indicator that responds to metabolic reactions during growth to identify a specific organism?
Answer:
Eosin methylene blue agar (EMB) is a selective and differential medium used to isolate fecal coliforms. Eosin Y and methylene blue are pH indicator dyes which combine to form a dark purple precipitate at low pH; they also serve to inhibit the growth of most Gram positive organisms.
Explanation:
Which of the following statements about biomolecules is true?
a. Nucleic acids (DNA/RNA) are responsible for information storage, transmission, and expression.
b. Proteins are broken down as a primary fuel source.
c. Lipids are responsible for the transport of substances into the cell.
d. Carbohydrates are responsible for the catalysis of chemical reactions.
a. Nucleic acids (DNA/RNA) are responsible for information storage, transmission, and expression.
Answer:
A
Explanation:
Nucleic acids are one of the four biomolecules. They are polymers made up of monomer building blocks called nucleotides, hence, they are also called polynucleotides. Deoxyribosenucleic acid (DNA) and Ribosenucleic acid (RNA) are the two nucleic acids. They are composed of nucleotide subunits, in which each nucleotide has a structure made up of pentose sugar (Deoxyribose in DNA, and ribose in RNA), phosphate group and nitrogenous bases (Adenine, Guanine, Cytosine and Thymine (DNA /Uracil (RNA).
DNA is the storage molecule of the genetic material in living cells. They contain sections called GENES, that holds the information needed for the optimal functioning of every organism and pass genetic traits to offsprings. These information has to be expressed to produce functional products (proteins). This expression is done by transcribing the DNA into RNA, which is subsequently translated into proteins.
Hence, option A is the true option
Option B belongs to carbohydrates while Option D is for proteins.
If the concentration of salt in the fluid surrounding cells decreases and the concentration of other solutes remains constant?
Answer:
The cell will swell.
Explanation:
The cells react distinctly when placed in different solutions like hypertonic, isotonic and hypotonic solutions. In the mentioned question, that is, in the fluid surrounding the cells, the concentration of salt reduces, which makes the solution hypotonic. Hypotonic solution exhibit high water potential and low solute concentration.
This makes the water move from the hypotonic solution to the inside of the cell as the osmotic movement occurs from high solvent concentration to low solvent concentration, thus, swelling of the cell takes place.
Investigator Barnes has examined the body of a young man who was murdered in his apartment. The body is just beginning to relax from rigor mortis. If the time is now 10:30 am on Friday morning, the condition of the body would indicate what possible time of death?
Between 2 am and 10 am on Monday
Between 10:30 am on Wednesday and 10:30 am on Friday
Between 10:30 pm on Wednesday and 10:30 pm on Thursday
Between 10:30 am on Saturday and 3 pm on Wednesday
Between 10:30 pm on Wednesday and 10:30 pm on Thursday the death has occurred.
Option C.
Explanation:Rigor mortis is the phenomenon where the dead body becomes stiff and rigid because of some chemical and enzymatic reactions inside the dead body after a few hours of its death. Rigor mortis occurs as the glycogen reserve of the body has ended and the ATP production mechanism has been finished, resulting in non detachment of actin and myosin filaments from each other, resulting in the muscles being stiff as ropes.
Time of rigor mortis depends on the body glycogen reserve, the ambient temperature, and humidity as well. In warmer regions, the rigor mortis sets in quickly as well as depletes away quickly. The reverse occurs in colder region. In our climate, Rigor mortis sets in from the papillary muscles of eyes after about 12 hours of death, as well as dissappear after 12 hours of set in. So about 12 to 24 hours is spent in appearing and disappearing of the rigor mortis.
Here in the said body, the death has occurred between 10:30 pm on Wednesday and 10:30 pm on Thursday.
Populations that exhibit logistic growth still exhibit exponential growth. This statement is:
Select one:
a. true; logistic growth is another term for exponential growth.
b. true; however, this can only occur in different populations of the same organism because one population cannot exhibit both types of growth.
c. false; exponential growth and logistic growth are characteristics of different species.
d. true; populations exhibiting logistic growth go through a period of exponential growth before growth rates level off around zero.
e. false; populations exhibiting logistic growth show exponential growth when the population size is greater than the environment's carrying capacity.
Answer: Option B (True)
Explanation: The statement can only occur in different populations of the same organism. The two growth strategies happens in different modes.
Firstly, logistic growth occurs when the resources available in the habitat (i.e organism’s niche) are limited to satisfy the whole population and this allows the organisms of the same species to grow rapidly until it reaches the point the resources can circulate, the carrying capacity.
While exponential growth occurs when there's abundance of resources for the population and allows growth of population beyond the carrying capacity, which results to overshoot of population in later stage of growth.
Secondly, in logistic growth population rarely crash but in exponential growth, population crashes due to mortality (often by predation, disease outbreak and etc) when there's overshoot of population beyond the carrying capacity.
Note: Population refers to the total number of organisms of the same species inhabiting a geographical area at a particular time.
Logistic growth starts off as exponential in its early stages, when resources are plentiful, but slows and levels off as resources become scarce. This is typical of many populations across various species and environments, and it does not differentiate one species from another.
Explanation:The statement 'Populations that exhibit logistic growth still exhibit exponential growth' is true, but it needs clarification. The correct answer is 'true; populations exhibiting logistic growth go through a period of exponential growth before growth rates level off around zero.' This reflects the nature of logistic growth, which starts off as exponential during the early stages when resources are plentiful but slows down and levels off over time as resources become scarce.
During the initial stage, species multiply rapidly, and the population size increases exponentially. However, eventually, the population size begins to approach the carrying capacity of the environment, at which point population growth rates decline and level off.
This behavior can be observed in a variety of species and in different types of environments, but it is not a characteristic that differentiates between species. It is a universal natural population behavior when the growth is limited by an environment's resources.
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What strategies should the radiologic technologist adopt to maintain good communication while approaching a child for radiographic examination? Select all that apply. 1 Greet the child and parent with a smile. 2 Use trivial praise to motivate the child. 3 Ensure that the correct child is identified. 4 Bend down to the child’s eye level and talk. 5 Answer questions that are helpful for the child.
Answer: 1, 4, 5
Explanation:
To maintain good communication while approaching a child for radiographic examination,
1)When addressing the child, sit or kneel so as to be at the child's eye level.
2)Establish rapport with the child by talking to the child from a comfortable distance before approaching him or her;
3)Considerations when communicating with a child include: age- appropriate methods of communication to include sensitivity for the child and the parent;
4) Acquaint the child with the new environment; explain the procedure to the child and the parent as effectively as possible;
Answer:
The radiologist must follow options 1,2,4, and 5.
Option 3 is not necessary.
Explanation:
The radiologist needs to show genuine consideration to the child. There should be sensitivity in the communication with the child.
The radiologist needs to greet the child and parent with a smile. This is the first antidote to their anxiety. It will simply calm both the child and parent and make them feel relaxed. The radiologist needs to establish a close bond with the the child by talking to the child from a comfortable distance before approaching the child. He can do this by praising the child for something. This might make the child smile or laugh, thereby motivating the child.
The radiologist should effectively explain why the child is in the new environment and also explain its procedure to the child and parent, answering their questions in a simple way so that the child can understand.
Lastly, while speaking to the child, the radiologist must bend down, sit or kneel so as to be at the child's eye level. This will help the child look into his eyes and feel assured.
Hypovolemic shock caused by severe burns is the result of a loss of: Select one: a. whole blood. b. red blood cells. c. plasma. d. platelets
Answer:
Option (C)
Explanation:
Plasma is usually defined as those liquid portions in blood, that is comprised of about 55% of total blood by volume. It is mostly water, having about 90% by volume, and are mixed up with dissolved proteins, hormones, mineral ions, and CO₂.
Hypovolemic shock usually refers to a dangerous and critical condition that occurs when there is a loss of more than 20% of plasma from the body. This does not allow a sufficient amount of blood to pump to an individual's body, as a result of which organ failure may occur.
Thus, Hypovolemic shock usually is caused by severe burning is a result of the loss of plasma from the body.
Hence, the correct answer is option (C).
_____are needed for sexual reproduction.
Gametes
Pollen
Spores
Cells
Answer:
Gametes
Explanation:
Gametes are sex cells.
The electrical current (signal) moves slower through the the conductive cells compared to it's movement through regular cardiomyocytes (heart muscle cells).
Answer:
False
Explanation:
The heart transmits electric current that causes contraction of the heart muscles. The depolarization to threshold caused by positive charged ions entering the cell occurs faster in conductive cells compared to the surrounding cardiomyoctes.
Due to this, the conductive cells are able to direct the signal in an organized manner so that the heart can contract promoting proper blood flow.
In neuronal communication, ________ involves moving a neurotransmitter from the synapse back into the axon terminal from which it was released.
Answer:
In neuronal communication, _reuptake_ involves moving a neurotransmitter from the synapse back into the axon terminal from which it was released
Reuptake is the reabsorption of a neurotransmitter by a neurotransmitter located along an axon terminal's plasma membrane (i.e., the pre-synaptic neuron at a synapse) or glial cell after performing its role of transmitting a neural impulse.
Can you identify the class of organic molecule to which these molecular structures and examples belong? Part A Sort these items into the appropriate bins.
There are four classes of organic molecules that are essential to all living organisms.
1. Carbohydrates:
Components: monosaccharides. Functions: energy for cell, raw material, energy storage, and plant cell support Ex: glucose, starch, glycogen, cellulose
2. Lipids (dont form polymers): Components: glycerol, fatty acid, components of a fat molecule Functions: energy storage, cell membrane components, and hormones Ex: fats, phospholipids, and steroids
3. Proteins:
Components: amino group, carboxil group, R group, and amino acid Function: enzyme, structural protein, movement, transport, communication, defense, storage, receive signals Ex: lactose, hair, tendons, muscles, hemoglobin, signal proteins, antibodies, egg albumin, receptor protein
4. Nucleic acids:
Components: phosphate group, nitrogeneous base, ribose or deoxyribose, nucleotide Functions: heredity, DNA
Ex: code for proteins, DNA and RNA
The different classes of organic molecules include carbohydrates, lipids, proteins, macromolecules, and nucleotides. They are characterized by their structures, carbon skeletons, and functional groups.
Explanation:The class of organic molecules depends on their structure and composition. Some examples include carbohydrates, which can be simple sugars (monosaccharides) or complex carbohydrates (polysaccharides). Another important class is lipids, which include fats, oils, and sterols. Proteins are another class, and they are made up of amino acids.
Macromolecules form another class, typically composed of smaller units (monomers) bonded together. Carbon is a crucial element in these organic molecules, forming covalent bonds with other atoms. Lastly, nucleotides form a class, which are components of nucleic acids like DNA and RNA, also vital for life.
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Continuous rotation of the CT x-ray tube and detector array, with simultaneous movement of the CT couch, has been accomplished through implementation of__________.
Answer:
The options
A. Additional cables
B. Slip rings
C. Multiple rows of detectors
D. Electron beam CT.
The CORRECT ANSWER IS B.
B. Slip rings
Explanation:
During the 1990s, the use of slip ring technology promoted consecutive rotation of the x-ray tube (via removal of cables) and concurrent couch locomotion.
The Sixth-generation CT scanning is referred to as helical (or spiral) CT—allowing procurement of volume multislice scanning.
Today's helical multislice scanners, makes use of thousands of detectors (around 60+ rows), can derive continuous data procurement of 128 "slices" per tube rotation and can undergo 3D multiplanar reformation (MPR).
Fifth-generation CT employs electron beam; as the ultra high-speed CT is employed majorly for cardiac imaging.
You are walking after dark. A sudden noise frightens you. Your heart pounds, your pulse races, and your breathing rate increases. These responses are due to your _____
Answer:
Answer is sympathetic nervous system.
Explanation:
Sympathetic nervous system is considered or known to be part of the autonomic nervous system. The other part is parasympathetic nervous system.
The sympathetic nervous system , which originates from the spinal cord , responds to reflex or unconscious actions by accelerating or increasing heart rate and blood pressure.
The responds of the sympathetic nervous system is termed as fight-flight response. This means that, the nervous system triggers the body to respond to event by fighting or running.
It regulates reflex actions.
In fruit flies, the color of the eyes is sex linked (on the X chromosome). A cross of the flies in the image will produce.
a. 100% white eyed flies
b. 100% of the females with white eyes, 50% of the males with white eyes.
c. 100% red eyed flies
d. 100% of the females with red eyes, 100% of the males with white eyes.
Answer:
d. 100% of the females with red eyes, 100% of the males with white eyes
Explanation: sex linked gene are usually linked with sexes and fruits flies is one fly that exhibit such traits. The first generation of the cross will give us all males with white eyes and all female with Red eyes 100% from both male and female
Based on the assumption that red-eye is represented by R allele and white by r allele, 100% of the females would be red-eyed while 100% of the males would be white-eyed.
The cross will produce the following genotypes and their respective phenotypes:
[tex]X^RX^r[/tex] - red-eye, female[tex]X^RX^r[/tex] - red-eye, female[tex]X^rY[/tex] - white eye, male[tex]X^rY[/tex] - white-eye, maleThus, all the females from the cross will be red-eyed while all the males will be white-eyed.
More on x-linked traits can be found here: https://brainly.com/question/1381309?referrer=searchResults