8. Why do high levels of cortisol, a steroid hormone from the adrenal cortex, cause a decrease in the pituitary secretion of ACTH?
- a. High levels of cortisol stimulate other steroid hormones to be released.
- b. The cortisol acts synergistically with other hormones.
- c. ACTH participates in a negative feedback loop with cortisol.
- d. CRH from the hypothalamus inhibits ACTH release.