For girls at puberty:
a. the pituitary gland signals the ovaries to significantly increase estrogen production.
b. androgens stimulate growth of the breasts.
c. estrogen levels determine the darkness and amount of facial hair.
d. all of these
Question 2Which substage of sensorimotor development serves as a transition to the symbolic thought of the next stage?
a. tertiary circular reaction
b. secondary circular reaction
c. invention of new means through mental combinations
d. coordination of secondary schemes
Question 3At age 20 to 21, men stop growing taller because:
a. the production of estrogen keeps the bones from growing any longer.
b. testosterone causes epiphyseal closure.
c. the thalamus signals a reduction in the development of calcium.
d. the hypothalamus triggers a reduction in cortisol production.
Question 4Which of the following is an example of a tertiary circular reaction?
a. Kala accidentally touches her nose with her thumb; it makes her laugh, she then repeats the action and it makes her laugh again.
b. Jose turns toward the sound of the phone ringing.
c. Lorenzo kicks his mobile over and over because it makes it move.
d. After many tries, Megan turns her toy sideways and is able to pull it into the crib. Now, whenever she wants the toy, she turns it sideways to pull it through.
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