Chemical Coordination and Integration · NEET Preparation Zoology
In a person with inadequate iodine intake, which endocrine change is most likely to occur because of reduced thyroxine synthesis?
Practice question from Chemical Coordination and Integration (NEET Preparation Zoology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-7EAE04
In a person with inadequate iodine intake, which endocrine change is most likely to occur because of reduced thyroxine synthesis?
- A.Decreased thyrotropin-releasing hormone and decreased thyroid-stimulating hormone
- B.Increased thyrotropin-releasing hormone and increased thyroid-stimulating hormoneCorrect answer
- C.Increased thyroxine secretion due to positive feedback
- D.Decreased thyroid-stimulating hormone with no change in thyrotropin-releasing hormone
Solution
Low thyroxine reduces negative feedback on the hypothalamus and anterior pituitary. Consequently, thyrotropin-releasing hormone and thyroid-stimulating hormone secretion increase, stimulating the thyroid.
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