Hank has been overweight since childhood. He diets frequently and can lose weight but always seems to gain it back, because he is unable to control his eating. Hank may have a problem with his.

a. catecholamine level.
b. thyroid gland.
c. pituitary gland.
d. limbic system.

Hank has a problem with the pituitary gland.

Explanation:

The pituitary gland is a small gland that resembles a pea located in the head. Its role is regulating important body functions and wellbeing of people. It is called the master gland of the body because it controls activities of other glands which secretes hormones.

Pituitary tumors develop in the pituitary gland which causes the overproduction of some hormones. Pituitary tumors results in fatigue, weight loss or weight gain or sometimes blindness. Hank has a problem with his pituitary gland which is causing him to be gaining weight even though he's on diet.