Older individuals sometimes use large amounts of perfume because they lose their sense of smell; this is related to
A) central adaptation.
B) a decrease in the number of olfactory receptors.
C) a decrease in sensitivity of the olfactory cortex.
D) sensory adaptation.
E) None of the answers are correct.
B) a decrease in the number of olfactory receptors.
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The glial cell with perivascular feet that wrap around capillaries in the CNS is the
A. astrocyte. B. ependymal cell. C. neurolemmocyte. D. microglial cell. E. oligodendrocyte.
The peptide ________ may play a role in the positive feedback of estrogen on GnRH secretion.
Fill in the blank(s) with the appropriate word(s).
Ammonia usually ________.
A. acts as a buffer B. ionizes to form a hydroxyl ion C. acts as a base D. acts as an acid
What is the correct order of structures as you move from outside a muscle cell, to deep inside it?
A) fiber, myofibril, myofilament B) myofilament, fiber, myofibril C) myofibril, myofilament, fiber D) myofilament, myofibril, fiber