NEET Biology question

Which statement is correct about the thyroid gland?

(A)Thyroid hormones are essential for the early development and maturation of the central nervous systemCorrect
(B)T3 and T4 stimulate the secretion of TSH by the anterior pituitary
(C)People who have an over active thyroid gland have a low BMR
(D)Low plasma levels of thyroid hormones leads to thyrotoxicosis

Answer: (A)

Solution

T3/T4 actually inhibit (not stimulate) TSH secretion through negative feedback, ruling out (b); an overactive thyroid raises, not lowers, BMR, ruling out (c); low thyroid hormone causes myxoedema/hypothyroidism, not thyrotoxicosis (which is due

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Question ID VK-128658