Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 7 PCB Single Correct MCQ
Published on: August 14, 2026

Pineal gland is a small, whitish flattened gland situated at the tip of a small fibrous stalk that arises from dorsal wall of dienceptation. It is known to secrete one hormone, which

A
causes dilation of blood vessels
B
retards glucose consumption and protein synthesis
C
causes demineralisation of bones
D
helps in maintaining the normal rhythms of sleep wake cycle

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The correct answer is:
D

The pineal gland is located on the dorsal side of forebrain. It secrete a hormone called melatonin. It plays a very important role in the regulation of a 24 hours rhythm of our body. In addition, it also influences metabolism, pigmentation, the menstrual cycle as well as our defence capability.

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