Question

The 24 hour (diurnal) rhythm of our body such as the sleep wake cycle is regulated by the hormone melatonin .

• A. True
• B. False

Answer 1

The correct option is A True

Melatonin is a hormone secreted by the pineal gland. Melatonin secretion by the pineal is linked to the dark light cycle of the organism’s environment, being greatest at night and lowest by day. The hormone is involved in regulating certain diurnal and seasonal changes in the body. Such as the reproductive cycle in seasonally breeding animals. It is used as a drug to treat sleep disorders and symptoms of jet lag.