Lilly has just learned to walk backward. How old would you expect Lilly to be?

Which of the following is true about myelin?

a. It's a fatty substance. b. It is covered by axons. c. It inhibits neural communication. d. It slows down neuronal operations. e. It cannot be affected by illness.

The smooth rounded end of the penis is called the

a. glans b. penile gland c. corona d. corpora cavernosa