According to the discussion of medical aspects of AIDS,
a. people usually develop symptoms shortly after being infected with HIV.
b. one of the most common early signs of AIDS is unexplained weight gain.
c. HIV invades the red blood cells, causing devastating anemia in people who are infected with this virus.
d. people who are HIV positive are very contagious during the initial stages of the infection, even if they have no symptoms.
D
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Jack suffered a brain injury as a result of hitting his head while waterskiing. One of the problems that developed was that Jack could not pronounce certain words correctly for a long period of time; now that he has had extensive speech therapy, he can speak as he did before his accident. This is an example of the brain's __________, which allows the structure and function of his brain cells to change to adjust to the trauma.
A. adaptology B. stagnation C. neuroplasticity D. reflex arc
According to which theory of hearing will an 800-hertz tone produce 800 nerve impulses per second through the auditory nerve?
a. tonal base b. place c. amplitude d. frequency
According to the activation-synthesis theory of dreaming, the source of a dream is neuronal firing in which part of the brain?
A. Broca's area B. the cortex C. the pons D. the optical lobe
Suppose someone asks you, "On a scale from 1 to 10, with 1 being 'all nature' and 10 being 'all nurture' where would you put Alzheimer's disease?" Based on information provided in the text, the BEST answer probably is:
a) "definitely 1" b) "probably a 2 or a 3" c) "a 5, I guess" d) "most certainly a 9 or 10"