SSC CGL
MediumQ. No. which-organ-produces-the-hormone-melatonin
Which organ produces the hormone melatonin?
Last Updated:
AThyroid gland
BPituitary gland
CPineal gland
DAdrenal gland
Correct Answer: Pineal glandYour Answer: C
✅ Correct Answer: C — Pineal gland
Melatonin is produced by the Pineal Gland, a small endocrine gland located in the brain. Melatonin regulates the sleep-wake cycle (circadian rhythm). Its secretion increases in darkness (night) to induce sleep and decreases in light (day) to promote wakefulness. The pineal gland is also called the 'third eye' and is sensitive to light.
❌ Why other options are wrong:
• A. Thyroid gland — Thyroid gland produces Thyroxine (T3 and T4), not melatonin; regulates metabolism.
• B. Pituitary gland — Pituitary gland produces growth hormone, TSH, FSH, LH, prolactin, oxytocin; not melatonin.
• D. Adrenal gland — Adrenal gland produces cortisol, adrenaline (epinephrine), aldosterone; not melatonin.
📝 Important Note: Pineal gland = Melatonin (sleep hormone). Pituitary gland = 'Master gland' of the body. Thyroid = Thyroxine. Adrenal = Adrenaline (fight or flight). Melatonin supplements are used to treat jet lag and sleep disorders. Key SSC CGL endocrine gland question.
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