A) hypothalamus
B) thymus
C) pituitary
D) pineal
Correct Answer: D
Solution :
Pineal gland is small, stalked found in epithalamus of brain, secrets two hormones, i.e., (a) Serotinin, (b) Melatonin. Melatonin shows a marked diurnal rhythm with maximum concentration at midnight and minimum during noon. The hormone controls, sleep, mood, ovarian cycle, delay puberty etc.
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