Relative to neurons using other neurotransmitters, serotonergic neurons
a. are quite numerous
b. are surprisingly few in number.
c. project to very limited parts of the brain.
d. do not have different receptor subtypes.
b
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A problem with using Antabuse to help alcoholics stop drinking is that ____
a. many people are allergic to it b. alcoholics use it inconsistently c. the side effects are often deadly d. it has not been shown to be effective
What prevents the fetus from experiencing a sense of smell?
a. The nostrils are plugged with skin cells and then filled with amniotic fluid. b. The brain is not developed enough to detect odors. c. There is no sense of smell without a sense of taste. d. The sense of smell requires cognitive interpretation which does not take place until 6 months of age.
Regarding sleep patterns, which of the following statements is FALSE?
a. One study showed that 28-hour "days" work for some people. b. Astronauts continue to sleep on their normal earth schedule while in space. c. The natural sleep pattern has a ratio of two to one between time awake and time asleep. d. Adapting to shorter-than-normal days is more promising than adapting to longer-than- normal days.
The external genitalia form and begin to differentiate between male and female during the
a. zygote stage. c. fetal stage. b. embryonic stage. d. tgerminal phase.