Why can iodine deficiency increase the chance of enlargement of the thyroid gland?
Answer and explanation
Correct answer: Because iodine is necessary for thyroxine production
The governing concept is thyroid hormone production and feedback regulation. Iodine is a necessary raw material for making thyroxine in the thyroid gland. When iodine is deficient, thyroxine production falls; the body may stimulate the thyroid more strongly, causing enlargement of the gland, known as goitre. Therefore option A is correct. The other choices incorrectly connect iodine with insulin transport, reflex arcs, or neuron structure.
Frequently asked questions
What is the correct answer to this question?
Because iodine is necessary for thyroxine production
Why is this the correct answer?
The governing concept is thyroid hormone production and feedback regulation. Iodine is a necessary raw material for making thyroxine in the thyroid gland. When iodine is deficient, thyroxine production falls; the body may stimulate the thyroid more strongly, causing enlargement of the gland, known as goitre. Therefore option A is correct. The other choices incorrectly connect iodine with insulin transport, reflex arcs, or neuron structure.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
