Question

which gland is responsible for releasing melatonin?
a. pituitary
b. thyroid
c. pineal
d. adrenal

Explanation:

Melatonin is a hormone that regulates sleep - wake cycles. The pineal gland is known to secrete melatonin. The pituitary gland is the "master gland" that controls other endocrine glands and secretes hormones like growth hormone, thyroid - stimulating hormone, etc. The thyroid gland secretes thyroid hormones (triiodothyronine - T3 and thyroxine - T4) which regulate metabolism. The adrenal glands secrete hormones like adrenaline (epinephrine) and cortisol.

Answer:

C. pineal