Trauma to the anterior pituitary caused secondary hyposecretion of thyroid-stimulating hormone (TSH). What would you expect to happen to the levels of thyroid-releasing hormone (TRH) and thyroid hormones (TH) ?

Question

Biology

Alaina Cowan

5 May, 13:19

Trauma to the anterior pituitary caused secondary hyposecretion of thyroid-stimulating hormone (TSH). What would you expect to happen to the levels of thyroid-releasing hormone (TRH) and thyroid hormones (TH) ?

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Answers (1)

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Davis Bentley · Answer 1

TRH level will increase and the TH level will decrease.

Explanation:

The thyroid gland produces two forms of hormones known as the T3 and T4. The thyroid secretion is controlled by the secretion from the anterior pituitary gland which is also controlled by the hypothalamus therefore a loop is formed especially negative loop.

The thyroid secretion regulates the secretion of the thyroid releasing hormones which release the thyroid-stimulating hormone from the thyroid.

If a tumour occurs in the anterior pituitary gland then the thyroid secretion will be decreased that is TH will be decreased. The deceased TH will not be able to inhibit the secretion of TRH as a result of which the TRH level increases.

Thus, TRH level will increase and the TH level will decrease.