Question : Assertion: Melatonin influences the menstrul cycle, Pigmentation and defense capability. Reason: Melatonin plays an important role in the regulation of diural rhythm of our body.

Question : Assertion: Melatonin influences the menstrul cycle, Pigment

1.	Question : Assertion: Melatonin influences the menstrul cycle, Pigmentation and defense capability. Reason: Melatonin plays an important role in the regulation of diural rhythm of our body.
Answer» Solution :Melatonin (secreted by pineal gland) concentartion in the blood appears to follow a diumal (day-night) CYCLE as it rises in the evening and thorugh the night and drops to a low around noon. Because of this light MEDIATED response. The pineal gland may act as a KIND of blockgical clock's which may produce circadian RHYTHMS (variations following a 24 hour cycle). In addition, melatonin also influences metabloism. pigmentation, the menstural cycle as well as our defence capability.