Which of the following types of physical activation have been found to occur during REM sleep?
A) The muscles of the middle ear become active.
B) The salivary glands in the mouth become active.
C) The Raffini corpuscles in the nose become active.
D) The ciliary muscles of the lungs become active.
Answer: A
Psychology
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Like longitudinal research, cross-sectional studies can be threatened by
A) practice effects. B) participant dropout. C) sequential timing. D) cohort effects.
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Research indicates that a monozygotic twin has almost a ____ risk of developing schizophrenia when the other twin develops the disorder
a) 25% b) 100% c) 50% d) 10%
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