The baby's fontanelles normally disappear by the age of two
a. days.
b. weeks.
c. months.
d. years.
D
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The National Research Council reported in 2013 that life expectancy in the U.S. lags behind other high-income countries for four reasons. Which of the following is one of those reasons?
a. poor health behavior like excessive smoking, drinking, and eating b. people below the poverty line demanding access to excessive amounts of healthcare c. web-based medical information programs and social support networks providing misinformation d. high percentage of exercise-related injuries leading to premature death
_____ has shown gender differences in infants as young as 5 months old
a. Verbal ability c. Self-esteem b. Spatial ability d. Mathematical ability
Adoption studies of personality show . . .
a. The same levels of heritability as twin studies b. Higher levels of heritability than twin studies c. Lower levels of heritability than twin studies d. Heritability does not apply to adoption research
When an action potential reaches an axon terminal, calcium
a. rushes into the cell immediately, because this negatively charged ion is attracted to the now-positive environment of the axon terminal b. rushes out of the axon terminal, because this positively charged ion is repelled by the now-positive environment of the axon terminal. c. leaves the axon terminal as the action potential recedes, because that is when the calcium channels begin to open. d. enters the axon terminal as the action potential recedes, primarily due to diffusion.