As the muscles in your body relax during Stage 1 sleep, the reflex muscle contraction that may happen is called
a. an autonomic cramp.
b. a hypnic jerk.
c. the restless leg syndrome.
d. the hypnogogic image syndrome.
ANSWER: b
Psychology
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Ivan Pavlov studied the reflexive flow of saliva in dogs. He used meat powder or other food to trigger the salivation. In this instance, the meat powder was the ________
a. conditioned stimulus b. unconditioned stimulus c. conditioned response d. unconditioned response
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