Question

in a thyroidectomized rat (in which the thyroid gland has been surgically removed), how would each...

in a thyroidectomized rat (in which the thyroid gland has been surgically removed), how would each of the following hormones be affected?

a) thyroxine

b) thyroid-stimulating hormone

c) thyrotropin-releasing hormone

Science   Anatomy-And-Physiology   
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Answer #1

Answer:

a) Thryroxine: Decreases to negligible value

b) Thyroid Stimulating hormone: Increases

c) Thyrotropin releasing hormone: Increases

Explanation: In thyroidectomized rat, thyroid gland is removed. Thyroidectomy can be partial or complete. Both ways, Thryroxine level would decrease as it is produced by Thyroid gland. Consequently, body tries to restore T3 and T4 levels, therefore it increases the Thyroid Stimulating Hormone and Thyrotropin Releasing Hormone.

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