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What is the scientific reason for goitre due to iodine deficiency?

Answer and explanation

Correct answer: Iodine deficiency affects thyroxine production

The governing concept is thyroid hormone synthesis and feedback regulation. Iodine is an essential raw material for producing thyroxine in the thyroid gland. When iodine is deficient, thyroxine production falls; the pituitary may then stimulate the thyroid more strongly through increased thyroid-stimulating hormone. Persistent stimulation can enlarge the thyroid gland, producing a visible swelling called goitre. Therefore option A is correct; the other options concern insulin, the spinal cord or dendrites and are unrelated.

Related tags

IodineThyroxineGoitreEndocrine-SystemControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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