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An enlargement of the thyroid gland appearing as a swelling in the neck due to inadequate iodine in the diet is called:
ATetany
BMyxoedema
CAcromegaly
DGoitre
Answer & Solution
Correct answer: D. Goitre
1. Iodine is needed to make thyroxine.
2. An inadequate iodine supply in the diet enlarges the thyroid gland.
3. The enlarged gland protrudes as a neck swelling called goitre.
4. Myxoedema is adult hypothyroidism, acromegaly is excess GH, and tetany is low calcium, so they are ruled out.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 16 Plant and Animal Hormones "Goitre", p.242_
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