Which of the Following Suppress(es)the Secretion of ACTH

Question

Which of the following suppress(es)the secretion of ACTH?
A) Elevated blood glucose levels
B) Dietary iodine
C) Corticotropin-releasing hormone (CRH)
D) Elevated plasma cortisol levels

Accepted Answer

Elevated plasma cortisol levels suppress the secretion of ACTH through negative feedback inhibition. When cortisol levels are high, they act on the hypothalamus and the anterior pituitary gland to reduce the secretion of CRH and ACTH, respectively. This helps to regulate the levels of cortisol in the body.