Biology · Endocrine System
Consider the following statements regarding thyroid physiology and diagnosis: Statement I: Subclinical thyroid dysfunction may present with abnormal TSH values even when circulating levels of free T3 and T4 remain within the normal physiological range. Statement II: In subclinical thyroid dysfunction, the pituitary gland reduces TSH secretion in response to minor fluctuations in T3 and T4, which directly confirms impaired thyroid hormone synthesis. Which one of the following is correct in respect of the above statements?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Statement I is incorrect, but Statement II is correct.
- 2Statement I is correct, but Statement II is incorrect.✓
- 3Both Statement I and Statement II are correct, but Statement II is not the correct explanation for Statement I.
- 4Both Statement I and Statement II are correct, and Statement II is the correct explanation for Statement I.
Correct answer
Statement I is correct, but Statement II is incorrect.
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