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.
Frequently asked questions
What is the correct answer to this question?
Iodine deficiency affects thyroxine production
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
