alleryWhich sequence shows normal thyroid negative feedback?
AThyroxine falls, TSH falls
BThyroxine rises, TSH falls
CThyroxine rises, TSH rises
DThyroxine falls, TSH stays fixed
Answer & Solution
Correct answer: B. Thyroxine rises, TSH falls
Higher circulating thyroid hormone suppresses pituitary TSH secretion through negative feedback.
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