What is the primary role of thyroid-stimulating hormone (TSH) in the regulation of thyroid function?

A To stimulate the production of triiodothyronine (T3) and thyroxine (T4) ✓
B To inhibit the production of T3 and T4
C To regulate the growth and development of thyroid cells
D To convert T4 to T3

Explanation

TSH is a hormone produced by the pituitary gland that stimulates the thyroid gland to produce T3 and T4, which are essential for regulating metabolism.

Mnemonic

TSH = Thyroid Stimulator, Helper

Source

Guyton and Hall Textbook of Medical Physiology
Hormones and Endocrine Markers Endocrinology Thyroid Hormones Easy MEDICAL Confidence: high