The nervous system's role in hunger regulation is coordinated by the:
a. pancreas.
b. brain.
c. digestive tract.
d. spinal cord.
e. stomach.
Question 2
Which of the following is an active form of vitamin A in the body?
1.Rhodopsin
2.Beta-carotene
3.Retinol
4.Retin-A
5.None of these choices