Myelination is completed:

Peter was raised in the southern United States. When he feels that he has been insulted, it is likely that ________

a. his body will produce large amounts of cortisol. b. he will quickly realize it is unimportant and shrug it off. c. his body will decrease the amount of cortisol it produces. d. he will feel ashamed and will experience a decrease in testosterone production.

While at the zoo with his parents, young Jonah looks at a large snail behind a glass display. He looks up at his mother and, much to her surprise, says, "Mommy, that looks just like part of a human being's ear!" To which ear structure is Jonah referring?

a) the semicircular canals b) the basilar membrane c) the primary ossicle d) the cochlea