What happens to acetylcholine after it attaches to a receptor on the postsynaptic cell?
A. It is broken down into two components.
B. It is reabsorbed intact by the presynaptic cell.
C. It is metabolized by the postsynaptic cell as a source of energy.
D. It continues to stimulate the postsynaptic neuron until replaced by another neurotransmitter.
Answer: A
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Many older people have hearing problems despite good hearing aids. What is one reason? a. They have trouble holding their heads in the best position for hearing. b. They become too nervous and pessimistic about their hearing
c. They often become drowsy while trying to listen. d. They have trouble filtering out the irrelevant sounds.
Baseline is to treatment as _____ is to _____
a. dependent variable; independent variable b. independent variable; dependent variable c. control group; experimental group d. experimental group; control group
The refractory period is a period of time during which more:
a. resting potentials can be generated b. action potentials can be generated c. resting potentials cannot be generated d. action potentials cannot be generated
Mental activities that differ noticeably from normal waking consciousness are known as ________
a) hyperconsciousness b) an unconscious state c) relaxed wakefulness d) an altered states of consciousness