Dr. blackwell caused rats to stop breathing when he lesioned their _____.

Answers

Answer 1
Dr. Blackwell caused rats to stop breathing when he lesioned their MEDULLA.
When doctor Blackwell induced a lesion in the rats' medulla, he discovered that the rats stopped breathing. He explained this observation by saying that the medulla has functional role to play in the breathing process of rats.

Related Questions

what do you think would happen if dna did not have a backbone?

Answers

Their would be alot of mutations in genes. Also, we wouldn't be able to function properly.

Final answer:

The absence of a DNA backbone would lead to the loss of structural integrity, making the DNA strands susceptible to damage, unable to maintain their double helix structure, and incapable of proper replication and transcription, which would be catastrophic for any living organism.

Explanation:

If DNA did not have a backbone, it would lose its structural integrity. The phosphate backbone provides stability and protection for the DNA's genetic information. Without it, DNA strands would be prone to damage, unable to maintain their double helix structure, and incapable of proper replication and transcription. Such a scenario would be catastrophic for any living organism since DNA stores biological information essential for creating proteins and for the organism's overall functioning and reproduction.

The DNA backbone being resistant to cleavage is crucial. It allows for the preservation of the sequences despite environmental and chemical stresses. Furthermore, if the DNA backbone were not present, the replication of biological information would be fundamentally disrupted, and mutations would occur frequently, as there would be no mechanism to ensure fidelity during the replication process. This would lead to systemic failures at the cellular level, a breakdown in the transmission of genetic information, and ultimately, the inability of life as we know it to continue.

what is the function of a ribosome

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ribosomes are a cell structure that make protein
Ribosome make proteins so your body can function.

Hope this helps!

which statement best explains why a carbon atom can bond with itself easily

it is an organic element

it is an ion

it forms hydrogen bonds

it has four valence electrons

Answers

It has 4 valence electrons :)

it has four valence electrons

Which of these organelles is assists in making proteins for all types of cells? A.) Golgi apparatus B.) ribosomes C.) smooth ER D.) lysosomes

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My answer is B. Ribosomes It will help you :)

Answer:

b.ribosomes organelles is assists in making proteins for all types of cells.

Explanation:

Ribosome: is a type of cell organelle that present within all the living cells, and it provides a site for the synthesis of protein.It has two subunits, which are known as large and small subunits and both the subunits have protein and rRNA.The ribosome is known as supreme cell Organelle because its main role is protein synthesis, which necessary for cell survival.

Due to rapid urbanization fueled by trade, approximately what percentage of people live in urban areas of Australia?

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The city was a economic pull.

Carriers of the sickle-cell trait are less likely to die of _____

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Carriers of the sickle-cell trait are less likely to die of malaria. The gene doesn't protect against being infected with malaria, but it keeps the infection from actually taking hold. Originally, it was thought that it prevented infection altogether.

This type of molecule is the molecule used by plants for long term energy storage polysaccharides, lipids, proteuns

Answers

Carbohydrates (Macromolecule which is used for structural purposes for plants and animals and are good for short-term energy storage)

What skills do scientists use as they investigate scientific questions?

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the scientific method
a process used by scientist to investigate questions. It is a series of steps that allow scientist to meaningful experiments in an organized way.1)observe and ask questions. 2)form hypothesis.3)plan an experiment.4)conduct(do) the experiment 5)draw conclusions
Final answer:

Scientists utilize critical thinking, problem-solving, and communication skills primarily when investigating scientific questions. They might also use creativity and teamwork.

Explanation:

Scientists use a myriad of skills when investigating scientific questions. Some of the key skills are critical thinking, problem-solving, and communication. Critical thinking helps scientists analyze data and draw logical conclusions. Problem-solving assists in designing experiments or models to test hypotheses. Communication is vital for conveying findings or strategies effectively with others. Additional skills may include creativity, for developing innovative hypotheses or methods, and teamwork, for collaborating on larger research studies.

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what kinds of questions can be answered and what kinds of problems can be solved by science? what kinds of questions are outside the realm of science?

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Questions about natural phenomena

give an example of an environment that is highly biodiverse and explain

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A lake: theres algae in there. As well as different kinds of fish. Also frogs/tadpoles. Birds sometimes cool off in here as well. There are also abiotic factors of rocks, flowers, water, and sand/dirt.

Research indicates ____ is a better predictor of health outcomes, including multiple coronary heart disease risk factors, than bmi or wc

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The answer is the body fat distribution, it is because this will help an individual identify the distribution fat in his or her body and whether it is associated with conditions such as metabolic complications, obesity and whether if he or she is at risk for a certain illness.

Which of the following is NOT a pure substance?

Question 2 options:

Gold


Water


Helium gas


Coffee

Answers

Coffee is a homogenous mixture because it combines coffee grounds and water

The answer is, D. coffee

Which of these is not considered to be part of the excretory system? which of these is not considered to be part of the excretory system? integumentary system respiratory system urinary system cardiovascular system?

Answers

Answer: (B)

The pancreas is a part of the cardiovascular system. The heart and your circulatory system is a part of it (which includes blood and your veins/arteries).

Explanation:

One sign that does not tend to indicate hiv has moved on to aids is ______. a pcp infection

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Final answer:

A PCP infection is actually indicative of AIDS, as it's a common opportunistic infection that occurs when CD4 T-cell counts are very low. During the clinical latency stage of HIV infection, patients typically exhibit no symptoms, and the condition may not progress for many years, especially with antiretroviral therapy.

Explanation:

One sign that does not tend to indicate HIV has moved on to AIDS is a PCP (Pneumocystis pneumonia) infection. PCP is actually one of the most common and life-threatening opportunistic infections associated with AIDS, specifically occurring when the CD4 T-cell count falls below 200 cells/μL. When HIV progresses to AIDS, individuals are prone to various opportunistic infections due to the severe weakening of the immune system. Prior to this stage, during clinical latency, HIV is still active but reproduces at much lower levels, and the infected person often experiences no symptoms.

The CD4 T-cell count during this period is between 200 and 499 cells/μL, and without antiretroviral therapy, symptoms may not present for a decade or longer. However, with treatment, the latency stage can last several decades. Ultimately, the viral load increases and CD4 T-cell count decreases, leading to the development of AIDS-related symptoms and increase in opportunistic infections like PCP.

One sign that does not tend to indicate hiv has moved on to aids is Pneumocystis pneumonia .

A patient at a clinic who has tested positive for HIV with a CD4 T cell count of 700/µL and no apparent illness is in the chronic HIV infection stage. This stage can last from 3 to 20 years without treatment, during which HIV continues to infect and destroy helper T cells, but the patient may not exhibit any symptoms. Toward the end of the chronic stage, symptoms such as fever, weight loss, and swollen lymph nodes may occur.One sign that does not typically indicate HIV has progressed to AIDS is a PCP infection because the presence of PCP (Pneumocystis pneumonia) usually signifies that HIV has indeed progressed to AIDS. Other indicators of AIDS progression include a CD4 T cell count below 200 cells/μL and the occurrence of opportunistic infections.

When interpreting correlations, it is important to remember that a?

Answers

Final answer:

Correlation coefficients, ranging from -1 to +1, indicate the strength and direction of the relationship between two variables, but they do not imply causation. Strong correlations show tight data alignment in scatterplots, while weak correlations have more exceptions and less predictability. A coefficient of zero means no relationship exists between the variables.

Explanation:

When interpreting correlations, it's crucial to remember that correlation does not imply causation. A correlation coefficient, represented by the letter r, ranges from -1 to +1, indicating the strength and direction of the relationship between two variables. However, a strong correlation does not mean that one variable causes the changes in another. For instance, a positive correlation between hours studied and test scores indicates that as study time increases, so do the scores. Conversely, there would be a negative correlation between study hours and the number of questions answered incorrectly. Despite the direction, both scenarios could display the same strength of correlation. Additionally, a perfectly zero correlation coefficient means there is no relationship between the variables under consideration.

When examining the strength of a correlation, we look at how closely the data points in a scatterplot align along a sloped line. The closer the correlation coefficient is to 1 or -1, the stronger the relationship and the more predictable the behavior of one variable based on changes in the other. A correlation closer to zero indicates a weaker relationship. Moreover, correlations have exceptions, and a strong correlation indicates few or no exceptions, whereas a weak correlation has many exceptions. Furthermore, the data pattern might sometimes be better represented by a curve rather than a straight line, suggesting that different statistical methods may be more appropriate for analysis.

Which of the following causes macromolecules to be classified as organic molecules? carbon hydrogen nitrogen oxygen

Answers

Carbon is the answer you are looking for. However, not all carbon containing molecules are organic. Examples being carbon oxides such as CO (carbon monoxide) and CO2 (carbon dioxide). Some Chemists classify organic compounds as having a C-H bond present but this is not completely correct as this excludes molecules like benzenehexol (benzene with an alcohol group on each carbon rather than a hydrogen) which are considered organic. A solid definition of an organic molecule is not certainly agreed. Just remember that: all organic molecules contain carbon but not all carbon containing molecules are organic.

Which of the following is not a carbohydrate?

A. Cellulose
B. Lipids
C. Monosaccharides
D. Starch

Answers

Cellulose and starch are polysaccharides of carbohydrates.... there are 3 types of carbohydrates: monosaccharides, disaccharides, and polysaccharides... Therefore, the answer is B. lipids
Final answer:

Lipids are not a type of carbohydrate. Carbohydrates include substances like Cellulose, Monosaccharides, and Starch, whereas Lipids are a different type of organic compound.

Explanation:

In the context of the options provided, the group that is not a type of carbohydrate is Lipids. Carbohydrates are organic compounds that consist mainly of carbon, hydrogen, and oxygen atoms. They include substances like Cellulose, Monosaccharides (simple sugars like glucose), and Starch (a polysaccharide used by plants to store energy).

Lipids, on the other hand, are a different type of organic compound that includes fats, oils, and steroids. They are not classified as carbohydrates because they have different structures and functions within organisms.

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Sugar beets plants start from tiny seeds and grow to be large plants. where does the bulk of their mass come from?

Answers

Sugar beet
Sugar beet is a plant whose root contains a high concentration of sucrose and which is grown commercially for sugar production. In plant breeding it is known as the Altissima cultivar group of the common beet (Beta vulgaris).[1] Together with other beet cultivars, such as beetroot and chard, it belongs to the subspecies Beta vulgaris subsp. vulgaris. Its closest wild relative is the Sea beet (Beta vulgaris subsp. maritima) I hope this is maybe helpful

Explain how the size and shape of teeth determine their functions

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Over the course of evolution, teeth have adapted to different environments based on the changing human diet. There are four types of teeth in the human dental anatomy: incisors, canines, premolars, and molars. They each have different functions of cutting, grinding, crushing, tearing, and chewing food. An incisor has sharp edges to cut the food, whereas the canines are used for holding the food and tear it, the molars are flatter with four ridges and used for chewing, they all aid in the process of preparing the food for proper digestion.

The emerging baby receives oxygen through the umbilical cord. temporary squeezing of the umbilical cord during the birth process ____, whereas prolonged constriction of the cord

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The fetus and the emerging baby obtain oxygen over the umbilical cord. Passage through the birth canal is tight, and the umbilical cord is typically squeezed during the progression. But if the squeezing is temporary, the result is like holding one’s breath for a moment and no problems are likely to guarantee. But if the constriction of the umbilical cord is prolonged, developmental problems is likely to be the outcome. Prolonged constriction is more probable during a breech presentation or bottom-first presentation, when the baby’s body may press the umbilical cord in contrast to the birth canal.

Answer:

The emerging baby receives oxygen through the umbilical cord. Temporary squeezing of the umbilical cord during the birth process generally, causes no problems, whereas prolonged constriction of the cord is associated with developmental problems.

Explanation:

The umbilical cord is a tube that connects the baby to the placenta and is responsible for the exchange of nutrients, oxygen and excreta. Composed of two arteries and a vein encased in a jelly-like material - Wharton's jelly - the umbilical cord communicates the baby's circulatory system through the navel to the placental vessels and is normally inserted right in the center of this structure. The placenta, in turn, communicates to maternal vessels, making the necessary exchanges.

There are situations where the umbilical cord is tightened during the baby's birth, these situations are normal and most of the time do not cause any problems for either the baby or the mother. However, if prolonged umbilical cord constriction occurs, developmental problems may occur.

When many nerve impulses arrive in rapid succession at the synapse between a single stimulatory presynaptic neuron and a postsynaptic neuron, this situation is known as:?

Answers

It is known as the chemical synapse 

Plants produce oxygen when they photosynthesize. where does the oxygen come from?

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Plants produce oxygen when they photosynthesize, which comes from the splitting of the water during the light reaction.

During photosynthesis, in the light reaction following reactions takes place:

The light hits chlorophyll cells in photosystem II.They get the energy that moves from cell to cell until the P680 pair of chlorophyll molecules absorb it.An electron in this pair becomes excited due to extra energy, leaves the molecule reaches to the primary electron acceptor.Meanwhile, there's an enzyme that's splitting water molecules to give electrons, hydrogen, and oxygen.

Plants produce oxygen when they photosynthesize, which comes from the splitting of the water during the light reaction.

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Final answer:

The oxygen that plants produce during photosynthesis comes from water. This process converts carbon dioxide and water into glucose and oxygen, effectively making available the oxygen we breathe in the atmosphere.

Explanation:

During the process of photosynthesis, green plants convert carbon dioxide and water into glucose and oxygen. This process, facilitated by sunlight, is crucial to oxygen availability in the earth's atmosphere. The oxygen we, humans, and other animals breathe, interestingly, is effectively the waste product of plants. Through photosynthesis, plants have continuously replenished the earth’s atmospheric oxygen for about 2.4 billion years. Apart from this, photosynthesis contributes to the ozone layer's formation, which protects life on earth from harmful ultraviolet radiation. Functions like respiration in humans return the carbon dioxide back to the atmosphere, forming a cycle with photosynthesis. Therefore, the oxygen that plants produce during photosynthesis primarily comes from water.

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Activity: cohesion of water what process exerts the pull on water molecules that is relayed from leaf to root via cohesion?

Answers

The process is EVAPORATION.
In plants, as each water molecule evaporate, it pulls up the next water molecules and this set up a chain reaction in which one molecule pull along the next one. This process is made possible by the cohesion property of water.

Justify why the predator/prey relationship is a community level interaction.

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It is an interaction between two different species, so the organism, species and population levels are too low. The community level references interactions between members of different species.

Answer:

The  populations of different species that live together make a community. Since, predator and prey belong to different species and live in same habitat, their interaction is community level interaction.

Explanation:

A community consists of populations of different species that live together in a habitat. These populations of different species are dependent on each other in one or other way.

The predator-prey relationship is ecological interaction between two organisms of two different species wherein the predator derives its nutrition by killing the prey. Since prey and predator belong to different species and live in the same habitat, their interaction is one of the community level interactions.

The _____ was a worldwide effort to map the complete human genetic code.

Answers

The answer is 'The Human Genome Project". The Human Genome Project (1990-2003) was an international effort to map the compete human genetic code, the sequence of nucleotide base pairs that make up human DNA, collectively call the human genome. The official date of completion was timed to coincide with celebrations of the 50th anniversary of James D. Watson and Francis Crick's discovery of the double-helical structure of DNA (April 12, 2003). The Human Genome, the molecular instruction book of human life, contains the essential sequence of three billion base pairs of DNA.

Which of the functional groups is not reactive but serves as a recognizable tag on the dna molecule and alter the expression of genes in the cells?

Answers

Methyl functional group is a non-reactive but a recognizable tag on the DNA molecule and alter the expression of genes in the cells.

 Methyl contains one carbon atom which is bonded to three hydrogen atoms. For example, CH3. Methyl group occurs in organic compounds and part of a larger molecule.
It can be found alone in the three forms which are cation, radical, and anion.
Final answer:

The methyl group is a functional group that, while not reactive, serves as an identifiable tag on the DNA molecule and alters gene expression. This process, known as methylation, is important in controlling gene expression without changing the DNA sequence.

Explanation:

The functional group that's not reactive but serves as a recognizable tag on DNA molecules, altering gene expression in cells, is called a methyl group. This is characterized by a carbon atom bonded to three hydrogen atoms (CH3). Methylation, the addition of a methyl group to the DNA molecule, does not change the DNA sequence but is involved in controlling gene expression. It's a significant process in epigenetics, a field that deals with changes in gene expression without alterations in the basic DNA sequence.

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The diamond-shaped decal that identifies a cng car will not be found on the _______________.

Answers

The CNG decal will NOT be found on the windshield.

Windshield

The diamond-shaped decal that identifies a cng car will not be found on the windshield.

The windshield of a motorbike, car, or bus is the front window and it is usually produced from a treated glass (laminated safety glass), which is made up of two curved sheets of glass that has a plastic layer coated between them for safety, and are joined into the window frame. The windshields of motor bikes are usually composed of acrylic plastic or polycarbonate.


Is a grasshopper a heterotroph or autotroph?

Answers

Is a heterotroph because he doesn't reproduce food itself

Type of tissue that can be described as voluntary or involuntary

Answers

The tissues that are described as voluntary and involuntary would be MUSCULAR TISSUES or MUSCLES; with voluntary muscles having controlled by one's own will while involuntary muscles work without conscious control. 
Final answer:

Muscular tissue can be referred to as voluntary or involuntary. Voluntary muscles, such as skeletal muscles, are consciously controlled, while involuntary muscles, like smooth and cardiac muscles, function automatically without our conscious control.

Explanation:

The type of tissue that can be described as voluntary or involuntary is muscular tissue. This terminology is used to differentiate between muscles we consciously control, called voluntary muscles (example: skeletal muscles that move our arms and legs), and those that function without our conscious effort, named involuntary muscles (example: smooth muscles in our digestive system and cardiac muscles in our heart).

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Which term is correctly paired with its role in the body?

Answers

I'm pretty sure that it's C.
 the answer is D) glucose – a sugar found in blood that can be broken down to produce ATP
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