The concept of "immune privilege" explains why the central nervous system has

A. a completely different set of immune responses.
B. more MHC markers than other tissues.
C. a reduced immune response compared to the rest of the body.
D. a greater immune response than the rest of the body.


Answer: C

Biology & Microbiology

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Carbon 14 radioisotopes decay into stable ____

nitrogen 15 isotopes

a. carbon 13 isotopes b. nitrogen atoms c. carbon atoms d. nitrogen 15 isotopes e. sodium atoms

Biology & Microbiology

In the central nervous systems, axons of several neurons traveling together are called ____

a. nuclei b. fibers c. bundles d. tracts e. filaments

Biology & Microbiology

Margarine is made by hydrogenating vegetable oils so that they take on the consistency of butter. Propose a chemical basis for this change from a liquid to a solid.

A. Hydrogenation of fats changes them from unsaturated to saturated, which are more solid. B. Trans-fatty acid are changed from saturated to unsaturated, allowing them to solidify. C. Trans-fatty acids are changed from unsaturated to saturated, allowing them to solidify. D. Hydrogenation of fats changes them from saturated to unsaturated, which are more solid.

Biology & Microbiology

Which of the following molecules is least likely to be able to pass through a capillary wall?

A) an enzyme B) a sodium ion C) glucose D) oxygen

Biology & Microbiology