Which of the following glands regulates metabolism for body growth?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Thyroid Gland
The thyroid gland, in the neck, makes the hormone thyroxine, which sets the body’s rate of metabolism and is needed for normal growth and development of the body and brain. Too little of it in childhood stunts growth (cretinism); in adults its lack causes goitre or myxoedema.
Why the other options are incorrect
Option (1) Adrenal Gland — Incorrect. Sits on the kidneys and makes adrenaline for “fight or flight” and cortisol for handling stress.
Option (2) Pineal Gland — Incorrect. A small gland in the brain that makes melatonin, which controls the sleep-wake cycle.
Option (4) Testis Gland — Incorrect. Makes sperm and the male hormone testosterone, which controls male sex characters.