Chemical Coordination and Regulation Question 44
44. Melatonin is produced by
(a) thymus
(b) skin
(c) pituitary
(d) pineal gland
Show Answer
Answer : d
Hints & Solutions
(d) Melatonin is secreted by pineal gland present between the cerebral hemispheres. Melatonin concentration in blood follows a diurnal cycle, it rises in the evening and drops at noon. Melatonin lightens skin colour in certain animals and regulates working of gonads.
