At 6 months of age, American infants sleep about 14 hours a day, whereas infants who are the same age in Kenya sleep about 12 hours a day, and infants in the Netherlands sleep about 16 hours a day. This variation is best described by ____
a. reflexive responses
b. cultural practice
c. innate preprogramming
d. biological influence
Answer: B
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a. emotional needs. b. arousal needs. c. interpersonal needs. d. homeostatic needs. e. secondary needs.
Release of LH a. promotes the maturation of follicles
b. stimulates ovulation. c. prepares the uterus to receive an embryo. d. stimulates the development of the corpus luteum.
Gynecomastia is:
A) painful menstruation. B) bone mineral loss, more common in females. C) enlargement of the breasts in males. D) the third stage of breast development in girls.
When are REM sleep episodes the longest?
A. during the early part of the night B. during the middle part of the night C. during the late part of the night (near morning) D. REM sleep is equal throughout the night