As the joint cartilage wears away, people develop osteoarthritis, which causes:
A) slower reaction time.
B) pain when moving.
C) slower information processing.
D) lessened ability to hear.
Answer: B) pain when moving.
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Injections of the serotonin precursor, 5-hydroxytryptophan,
A) reverse the insomnia produced in cats or rats by the serotonin antagonist PCPA. B) reverse the sleep increases produced in mice by PCPA. C) are effective in the treatment of human insomnia. D) are effective in the treatment of human hypersomnia E) reverse the increases in delta sleep produced in volunteers by sleep reduction.
In Parkinsonism, the tremors, muscular rigidity, and reduced control over voluntary movements appears to be a function of
a. damage to glia cells. b. degeneration of neurons that use dopamine as a neurotransmitter. c. agonistic chemical action on the receptor sites of the cerebrum. d. enzymatic deficiency that does not allow for the proper cleanup of waste products in the nervous system.