If a virus were to infect and destroy the cells of the vestibular nucleus, which of the following would result?
A. Deafness
B. Loss of gustation
C. Loss of olfaction
D. Loss of equilibrium
E. Blindness
Answer: D
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What does this figure represent?
a) Erythropoiesis b) RBC differentiation c) Emigration d) Clot formation e) Clot retraction
Sperm cannot fertilize an egg unless they have been in the female reproductive tract for several hours. This enhanced ability of the sperm to fertilize the ovum is called capacitation. In vitro studies indicate that the sperm can fertilize the ovum if they are first washed before being introduced to the ovum. These observations suggest that
A) pH is an important factor in the process of capacitation. B) in capacitation, secretions of the female reproductive tract are taken up by the sperm. C) only sperm that come into contact with vaginal secretions are capable of fertilizing an ovum. D) capacitation is temperature-dependent. E) capacitation involves the removal of some inhibiting substance(s) from the sperm.
Which of the following receptor types is not found in the digestive tract?
a. chemoreceptor b. osmoreceptor c. proprioceptors d. mechanoreceptor e. none of these.
How do low-density lipoproteins (LDLs) move into cells?
A. LDLs are transported through a pump that is also an ATPase. B. LDLs diffuse through the phospholipid bilayer. C. LDLs diffuse through channels in the membrane. D. LDLs are engulfed through receptor-mediated endocytosis.