Questions: Multiple Choice Question TRH travels through the portal system from the hypothalamus to the anterior pituitary gland causing the release of T3 and T4 thyroid stimulating hormone thyroid releasing hormone thyroid hormone

Multiple Choice Question TRH travels through the portal system from the hypothalamus to the anterior pituitary gland causing the release of T3 and T4 thyroid stimulating hormone thyroid releasing hormone thyroid hormone
Transcript text: Multiple Choice Question TRH travels through the portal system from the hypothalamus to the anterior pituitary gland causing the release of $\qquad$ $T_{3}$ and $T_{4}$ thyroid stimulating hormone thyroid releasing hormone thyroid hormone
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Solution

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The answer is the second one: thyroid stimulating hormone.

Explanation for each option:

  1. $T_{3}$ and $T_{4}$: These are thyroid hormones released by the thyroid gland, not directly by the anterior pituitary gland.
  2. thyroid stimulating hormone: This is correct. TRH (thyrotropin-releasing hormone) from the hypothalamus stimulates the anterior pituitary gland to release TSH (thyroid stimulating hormone).
  3. thyroid releasing hormone: This is incorrect. TRH is the hormone released by the hypothalamus, not the anterior pituitary gland.
  4. thyroid hormone: This is a general term for hormones produced by the thyroid gland, such as $T_{3}$ and $T_{4}$, not directly released by the anterior pituitary gland.

Summary: TRH (thyrotropin-releasing hormone) travels from the hypothalamus to the anterior pituitary gland, causing the release of thyroid stimulating hormone (TSH).

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