Once cortisol levels reach a certain level, they block the release of both CRH and ACTH. This type of self-regulating feedback loop is called homeostasis. The HPA axis follows a circadian rhythm ...

The pituitary gland controls hormone production in the adrenals through signaling in a negative feedback loop. This works though the action of a hormone called ACTH (adrenocorticotropic hormone). ACTH ...