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Question
Assertion :Iodine deficiency causes goitre.
Reason: Reduced iodine intake decreases thyroxine production.
Assertion :Iodine deficiency causes goitre.
Reason: Reduced iodine intake decreases thyroxine production.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Goitre is the enlargement of thyroid gland which occurs due to deficiency of iodine in the body. Iodine is needed for the synthesis of thyroid hormone i.e. thyroxine. When the iodine levels are low, there is less synthesis of thyroxine, due to which thyroid gland becomes hyper active and enlarged to compensate the deficiency of thyroxine in the body. The enlarged thyroid gland is visible as a swelling in the throat known as goitre.
So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
Goitre is the enlargement of thyroid gland which occurs due to deficiency of iodine in the body. Iodine is needed for the synthesis of thyroid hormone i.e. thyroxine. When the iodine levels are low, there is less synthesis of thyroxine, due to which thyroid gland becomes hyper active and enlarged to compensate the deficiency of thyroxine in the body. The enlarged thyroid gland is visible as a swelling in the throat known as goitre.
So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
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