There are two main ways molecules move across membranes, the difference being related to whether cellular energy is used. Passive mechanisms such as diffusion do not consume energy, but active transport requires energy to be carried out.
Is diffusion active or passive transport?
Passive
Diffusion. Diffusion is a passive transport process. A single substance tends to move from the high concentration area to the low concentration area until the concentration is the same throughout the room. You know the diffusion of substances in the air.
The main difference between diffusion and active transport is that diffusion is a passive transport method in which molecules move across the cell membrane through a concentration gradient, whereas active transport transports molecules against a concentration gradient. It requires cell energy.
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How does a plant benefit from mycorrhizae?
Answer: By symbiotic association
Explanation: Mycorrhiza can be defined as the symbiotic association between the plant and fungus.
The term defines the function of fungus in the plant rhizosphere present in the roots of the plant. Its main function is to provide nutrition to the plant body.
This kind of association is mutualistic. In some cases it can have parasitic association.
Which epoch covers the time from 5 million to 1.8 million years ago?
1.Eocene
2.Miocene
3.Paleocene
4.Pliocene
Answer:
From the choices, the answer would be Pliocene. This is the shortest epoch of the Cenozoic era.
Which brain region processes the emotional significance of stimuli and generates immediate emotional and behavioral reactions?
The patient is awake many times during brain surgery. in an operation to remove a brain tumor, dr. judson accidentally poked a certain area of the cerebrum, whereupon the patient said, "why is my arm being tickled?" what area was poked?
What is the name for the measure of a drug's relative safety for use, computed by the ratio of the lethal dose for 50 percent of the population over the effective dose?
When you are working with chemicals you should _____. Select all that apply.
1. wear and apron and googles
2.use a ventilation hood
3.know the location of the fire blanket and fire extinguisher
4.wash the area with a 10% bleach solution
Answer: 1. wear an apron and googles
2.use a ventilation hood
3.know the location of the fire blanket and fire extinguisher
Explanation:
Chemicals in the laboratory if used inappropriately may cause accident or hazard. Therefore, special measures should be taken to avoid any loss of skin, clothes or lives working in a laboratory.
Following are the measures that should be taken while working with chemicals:
1. Wear an apron and googles: This will prevent the cloths from damage which may be caused if any accidental splash occurs. The goggles will protect the eyes from the fumes which may liberate during the reaction.
2. Use a ventilation hood: This will absorb the air which may consists of toxic gases produce after the reaction.
3.Know the location of the fire blanket and fire extinguisher: The fire blanket or fire extinguisher can help in preventing the damage caused due to accidental fire during the experimentation process.
A disease that appeared recently and is rapidly increasing or threatening to increase in the near future is referred to as:
a hurricane tore holes in the roof of your house , allowing a good deal of moisture inside l. very quickly , mold began to grow because of it . what would be the most effective and ecologically friendly way of killing the mold and why? answer
how high can a human fall without injury
External respiration is the exchange of respiratory gases between the organism and ________. it takes place via a ___________ membrane with thin ____________. internal respiration is the exchange of gases between __________ and the _________.
External respiration is the exchange of respiratory gases between the organism and the outer environment.
It takes place via a respiratory membrane with thin moist epithelial cells.
Internal respiration is the exchange of gases between blood and the cells.
The process of diffusion of gases (oxygen and carbon dioxide) in and out of the blood is respiration, internal and external respiration are the types of respiration.
What organism uses carbon dioxide in the air?
Emts respond to a known heroin abuser who is unresponsive. if they give naloxone (narcan) to this patient, the emts should recall that:
Answer:
Naloxone/Narcan administration may cause agitation and/or withdrawal symptoms.
Explanation:
Remember that the main purpose of administering Narcan/Naloxone is to correct respiratory depression in a patient. Prior to administering the medication, a patient must meet three primary criteria:
1. Pinpoint pupils ( evident in a patient with Opiod overdose)
2. Unconsiousness
3. Respiratory depression (cannot breath on their own)
Once those three criteria have been confirmed, under medical control guidance, you can administer Narcan/Naloxone (per proper packaging instructions).
The purpose of this medication is NOT to bring someone out of uncounsiousness. However, if too much is administered, there is a significant chance that the patient can become consious. Therefore, the patient can eitherr be 1) combative and angry because you "took him/her out of their high" or 2) they can be grateful that you helped them out. That being said, you want to be aware that if the patient is combative, your safety is at risk and you will need to involve law enforcement.
Hope this helps!
How is the sickle-cell allele maintained through natural selection? A.) Individuals with two recessive alleles have very high rates of reproduction. B.) Mosquitoes that pass along the parasite also pass on the recessive allele. C.) Individuals with two dominant alleles have very low rates of reproduction. D.) Heterozygous individuals pass the dominant and recessive alleles to offspring.
the answer is d as in doggy
What parts of your body should have protection whenever you fire a handgun?
The active ingredient in marijuana, tetrahydrocannabinol (thc) is stored in the body's ________ cells.
THC, the active ingredient in marijuana, is stored in the body's fat cells.
Explanation:The active ingredient in marijuana, tetrahydrocannabinol (THC), is primarily stored in the body's fat cells. THC is a lipid-soluble molecule, meaning it can easily dissolve in fat. When someone consumes marijuana, THC is absorbed into the bloodstream and eventually accumulates in fatty tissues throughout the body, including the brain, liver, and adipose tissue.
Because THC is stored in fat cells, it has a long elimination half-life compared to other drugs. This means that THC can remain detectable in the body for an extended period, even after the immediate effects of marijuana have worn off.
In summary, THC is stored in the body's fat cells, allowing it to be gradually released into the bloodstream over time.
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A student makes the analogy that the cardiovascular system is like a highway. Why is this a good analogy?
Answer:
The correct answer is that the blood transports materials to and from distinct parts of the body.
Explanation:
As an essential biological fluid, blood flows spontaneously in the blood vessels and the heart, mainly via the pumping of the heart. It comprises plasma, aqueous fluid, and various cells like red blood cells that offer it its color.
The blood helps in the mediation of nutrients and oxygen, which are essential for performing important procedures of the body. It also assists in translocating molecules and cells of the immune system to various tissues, and to disperse hormones all through the body.
Bacteria need the right kind of food to grow on. generally, they prefer foods that are high in protein, slightly acidic, and _______.
Bacteria optimally grow on high-protein, slightly acidic, and moist substances.
Explanation:Bacteria grow best on substances that are rich in protein, slightly acidic, and moist. Moist environments help bacteria to maintain the necessary solute concentration within their cells and they also aid in the transport of nutrients into the cell. Foods that contain a high protein content include meat, which makes it a prime substrate for bacterial growth.
The acidity level in foods is essential for bacterial survival. Most bacteria cannot survive in highly acidic environments, and hence they prefer slightly acidic foods. This is one reason why foods like lemon and vinegar can be used as natural preservatives to slow the growth of bacteria.
Cellular processes such as respiration and excretion also occur more efficiently in moist conditions. In summary, bacteria are microorganisms that prefer high protein, slightly acidic, and moist environments to grow best.
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Where on Earth's surface might you be if you are experiencing the trade winds? Explain how air pressure, temperature, and the Coriolis effect in movement and direction of thesewinds.
Which organ helps to pull air into the lungs by creating space and negative pressure in the lungs when it contracts?
the alveolus
the diaphragm
the bronchi
the glottis
To what phylum and class do tapeworms belong
Discuss the difference between chronic and acute pain
What is the chemicals called that are sometimes used to make the specimen visible in a microscope?
Final answer:
The chemicals used to make specimens visible under a microscope are called stains and dyes. These chemicals enhance contrast by adding color to otherwise transparent cells, allowing for detailed observation of cellular structures. Some common dyes include Texas red, FITC, DAPI, and acridine orange.
Explanation:
Introduction to Microscope Stains and Dyes
When viewing cells under a microscope, specimens often need to be made more visible through the use of stains and dyes. These chemicals add color to the cells, providing the contrast necessary to observe the details that are otherwise invisible due to cells' transparency. Microscopes, such as light microscopes and fluorescence microscopes, produce magnified images of microorganisms, human cells, and tissues.
Staining with Dyes
Stains and dyes are important for enhancing the visibility of microscopic organisms and cells. Some dyes are applicable to living microbes, while others require that cells be fixed with chemicals or heat before application. Each dye works uniquely depending on the cellular chemical composition of the microbes.
Fluorescence Microscopy
Fluorescence microscopes utilize fluorochromes, such as Texas red and FITC. These are fluorescent chromophores that absorb and then emit light, providing significant contrast. Nucleic acid dyes like DAPI and acridine orange highlight specific cell components under a fluorescence microscope.
Light Microscopes
Most student microscopes are light microscopes, advantageous for viewing living organisms. However, staining usually kills the cells, which is a trade-off for better visibility. A condenser system is used to increase the light on specimen, ensuring enough light is gathered to form a clear image.
Why does rwanda have the highest percentage of female lawmakers in the world?
The dna of ______ floats freely around the cell's cytoplasm.
Red blood cells contain the protein . when red blood cells are old or injured, the spleen breaks them down and converts the heme from their hemoglobin into . the liver further converts it into , which is stored in the . when you eat fat, the cells of your small intestine release the hormone . contraction of the forces the into the , where it emulsifies fats and aids in their digestion.
Red blood cells contain the protein HEMOGLOBIN. When red blood cells are old or injured, the spleen breaks them down and converts the heme from their hemoglobin into a GREEN PIGMENT CALLED BILIVERDIN. The liver further converts it into BILIRUBIN WHICH IS RELEASED INTO THE PLASMA AND IS RECIRCULATED IN THE LIVER AND IS THEN BOUND INTO ALBUMIN which is stored in the GALLBLADDER AND EXCRETED IN THE DIGESTIVE SYSTEM IN THE FORM OF BILE. When you eat fat, the cells of your small intestine release the hormone UROBILINOGEN where contraction of them forces them into the SMALL INTESTINE where it emulsifies fats and aids in their digestion.
Answer:
The correct answer given below:
Explanation:
Red blood cells contain the protein Haemoglobin. When red blood cells are old or injured, the spleen breaks them down and converts the heme from their hemoglobin into Bilirubin. The liver further converts it into Bile which is stored in the Gall bladder. When you eat fat, the cells of your small intestine release the hormone Cholecystokinin. Contraction of the Gall bladder forces the Bile into the Duodenum, where it emulsifies fats and aids in their digestion.
_____ fungus increases the area of the root for absorbing water and minerals from the soil.
1.Parasitic
2.Mold
3.Mycorrhizae
4.None Of The Above
The jellylike liquid located in the posterior chamber of the eye is the
The answer to this question is Vitreous Body. The Vitreous Body is a jelly form substance that fills the space on the eyeball of humans. The vitreous body also helps transmit light in the retina and this also functions to help maintain the shape of the eyeballs and make it stay in place.
What is the outcome of mitosis?
A. two identical nuclei
B. two identical spindles
C. two identical chromatids
Answer:
The correct answer is option A. two identical nuclei.
Explanation:
Mitosis is a type of cell division during which two identical daughter cells are produced from a single parent cell.
During mitosis, replicated chromosomes are divided into 2 new nuclei, It gives rise to identical cells with the same number of chromosomes.
During interphase, DNA of the cell is replicated and at the last of interphase, the original DNA and a copy of this DNA are in the nucleus of the cell.
In the M phase or mitotic phase, the nuclear DNA of the cell condenses into chromosomes and is pulled apart by the mitotic spindle, made out of microtubules. Four phase takes place during mitosis: prophase, metaphase, anaphase, and telophase. IT results in two identical daughter cells after cytokinesis.
Thus, the correct option is two identical nuclei.
The outcome of mitosis is two identical nuclei
What is the outcome of mitosis?The outcome of mitosis is the division of a cell into two daughter cells, each containing an identical set of chromosomes. During mitosis, the replicated chromosomes are separated and distributed equally into the daughter cells, resulting in the formation of two identical nuclei. This process ensures that each daughter cell receives the same genetic information as the parent cell, allowing for growth, tissue repair, and asexual reproduction in organisms.
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Susan’s aunt suffered from a cerebrovascular accident. what is the common name for this medical problem?
From the time a fertilized egg is implanted in a mother's uterus until about the eighth week of pregnancy, the developing organism is called a/an
A. placenta.
B. embryo. ( I think its this one.not sure.)
C. zygote.
D. fetus.