Which gland does TSH act upon?

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Prepare for the Anatomy and Physiology Test with multiple-choice questions and detailed explanations. Enhance your understanding of organ systems and boost your exam confidence!

Multiple Choice

Which gland does TSH act upon?

Explanation:
TSH is a thyroid-stimulating hormone from the anterior pituitary that acts specifically on the thyroid gland. It binds to receptors on thyroid follicular cells and activates a cAMP signaling pathway, increasing the synthesis and release of thyroid hormones (T3 and T4) and promoting growth of the thyroid tissue. This targeted action explains why the thyroid is the gland that responds to TSH. The adrenal cortex is driven by ACTH, the pancreas by insulin and glucagon regulation, and the pituitary gland is the source of TSH rather than its target.

TSH is a thyroid-stimulating hormone from the anterior pituitary that acts specifically on the thyroid gland. It binds to receptors on thyroid follicular cells and activates a cAMP signaling pathway, increasing the synthesis and release of thyroid hormones (T3 and T4) and promoting growth of the thyroid tissue. This targeted action explains why the thyroid is the gland that responds to TSH. The adrenal cortex is driven by ACTH, the pancreas by insulin and glucagon regulation, and the pituitary gland is the source of TSH rather than its target.

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