Author Question: At age 20 to 21, men stop growing taller because: a. the production of estrogen keeps the bones ... (Read 82 times)

geodog55 · **on:** Jun 22, 2018

At 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 2

Which 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.