CHAPTER 4: PHYSICAL DEVELOPMENT IN INFANCY

a. When infants are 3 months old, the amount of time they spend in REM sleep begins to increase. b. Most infants spend about 70 percent of their sleeping time in REM sleep. c. REM sleep might promote the brain’s development in infancy. d. Older adults are the only group that spends more time in REM sleep than infants. Answer: c. Difficulty ... ................
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