The "all-or-none law" explains what happens when:
a. positively and negatively charged ions meet
b. an impulse starts at the beginning of an axon
c. electrical impulses spread throughout the body
d. your brain gets the idea of a six-pack
B
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Under certain circumstances, researchers can study people without first obtaining their informed consent
Indicate whether the statement is true or false
For girls, breasts begin to enlarge during the 10th year. The breasts typically reach full size in about three years, but the mammary glands do not mature fully until:
a. age 16 c. a woman has a baby. b. menstruation begins. d. none of these
It is becoming more and more noticeable to Dierdre's sixth-grade class that she is entering puberty at an earlier age than most of her age mates. Based on research examining early maturation, Dierdre may be likely to
A) have younger friends. B) feel satisfied with her body. C) do well in school. D) have an increased risk for substance abuse.
Research on parenting has found that ______________________
a. the two main dimensions of parenting are demandingness and strictness b. children of permissive parents tend to do better in school than children of other parenting styles because they learn to think for themselves c. there are bidirectional effects between parents and their children d. the outcomes for children of authoritative parents are virtually identical to outcomes for children of permissive parents