Q. The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone
A) Adrenaline
B) Melatonin
C) Calcitonin
D) Prolactin
Explanation
[Solution from source] Melatonin, secreted by the pineal gland, regulates the 24-hour (diurnal) rhythm including the sleep-wake cycle. Adrenaline is the emergency hormone, calcitonin lowers blood calcium and prolactin stimulates milk production. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.