Question

Which of these is not a function of melatonin?

(a) Regulation of the diurnal cycle

(b) Regulation of body temperature

(c) Regulation of menstrual cycle

(d) Regulation of bowel movements

I had been asked this question during an interview.

This intriguing question comes from Chemical Control and Coordination topic in chapter Chemical Control and Coordination of Biology – Class 11

Answer 1

Correct choice is (d) Regulation of bowel movements

The best explanation: Melatonin is secreted by the pineal gland. It is responsible for the regulation of the sleep-wake or diurnal cycle, body temperature as well as menstrual cycle, but not bowel movements.