Question

Pineal gland secretes melatonin which is connected to

• A. Colouration of skin
• B. Sleep
• C. Anger
• D. Body temperature

Answer 1

Answer: (B)

Sleep

Pineal gland is a small, rounded and reddish brown gland present at the dorsal side of forebrain. This gland secretes melatonin and serotonin hormones. Melatonin is derived from amino acid tryptophan and secreted from pineal gland. It regulates the 24 hour rhythm of our body like sleep-wake cycle. Its levels in the body increase during night and fall in the morning time. High levels of melatonin induce sleep and hence, it regulates sleep-wake cycle of the body.

So, the correct answer is 'Sleep'.