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Q. Most biologists believe that immune system's defense against infections largely rests on its ability to distinguish self molecules from nonself molecules. This concept seems central to our understanding of immune function. However, like all scientific ideas, it is not beyond question. Some immunologists have developed an alternative hypothesis: that the immune system's effectiveness rests mostly on its ability to recognize damage to the body tissues caused by the invaders, not on the ability to recognize nonself. If you were going to test the "damage" hypothesis what might you look for? Which sort of cell would you expect to be directly affected by damaged tissues? Why? Some proponents argue that the "damage" hypothesis makes more sense from an evolutionary perspective, claiming that it is more advantageous for an organism's defense system to respond to tissue damage than to the mere presence of a foreign microbe. Do you be in agreement? Why or why not?
What is the possibility that their next child will show both defects? Demonstrate the work.
Aspirin has a pH of three. Some people who take large amounts of aspirin (for example, for arthritis) take a pill that combines aspirin with Maalox. What is the reason for this combination.
Which receptors were monitoring the drive, still the conscious part of your brain was asleep? Explain the proper answer.
Suppose the Sun had a temperature of 17,400 K (three times its present temperature) but was the same size it is now. How much more energy would the Sun emit per second.
Imagine looking during a microscope at a squashed onion root tip. The chromosomes of many of cells are plainly visible. In some cells, replicated chromosomes are aligned along center (equator) of the cell. These particular cells are in which stage of..
Mrs. Mulligan goes to her dentist and, after having a couple of cavities filled, her dentist strongly suggests that she reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats. Why give appropriate reasons.
What F1 phenotypic and genotypic ratios are formed from this cross . how may this affect the rate of protein synthesis.
What fraction of demes in each set is likely to become fixed for allele A1 versus A2. Explain the differences in head movement available to fish.
What specific biotechnology application did you choose. What benefits are derived from this application.
Action potentials are usually generated at axon hillock and propagated down axon away from the cell body. If you experimentally depolarized an axon to the threshold level at a point halfway down the axon, what would happen.
Lipid metabolites are often seen as key elements in cellular signaling. Is this unique? Please provide several examples of the function of lipids as key elements in signal arrays and list the biologic functions these signals affect?
What parts of the autonomic nervous system control heart rate and what effect does each have on it. What parts of the heart contract as the wave passes them and in what order.
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