What is the primary role of thyrotropin-releasing hormone (TRH) in the hypothalamic-pituitary-thyroid axis?

A Stimulate the release of thyroid-stimulating hormone (TSH) from the anterior pituitary gland ✓
B Inhibit the release of TSH from the anterior pituitary gland
C Regulate the release of growth hormone from the anterior pituitary gland
D Stimulate the release of adrenocorticotropic hormone (ACTH) from the anterior pituitary gland

Explanation

TRH is a hormone produced by the hypothalamus that stimulates the release of TSH from the anterior pituitary gland, which in turn stimulates the thyroid gland to produce thyroid hormones.

Source

Guyton and Hall Textbook of Medical Physiology
Hormones and Endocrine Markers Endocrinology Hypothalamic-Pituitary-Thyroid Axis Medium MEDICAL Confidence: high