Multiple choice

Goitre is caused by the malfunctioning of

  1. pancreas

  2. pituitary

  3. adrenal

  4. thyroid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Goiter is an abnormal enlargement of the thyroid gland, most commonly caused by iodine deficiency. The thyroid gland requires iodine to synthesize its hormones (T3 and T4). When iodine is deficient, the thyroid enlarges in an attempt to trap more iodine from the blood. Other causes include Graves' disease (autoimmune) and Hashimoto's thyroiditis. The pancreas (insulin/glucagon), pituitary (growth hormone, ACTH, etc.), and adrenal glands (cortisol, adrenaline) are not directly involved in goiter.

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