Hypothalamus-Pituitary-Adrenal Axis (HPA)
The HPA axis is a network of stress responses by the brain, pituitary and adrenal glands. The main function of the hypothalamus is to maintain the body's balance. It receives and sends messages from the nervous system via hormones through the circulatory system. The hypothalamus regulates and controls blood pressure, digestion, sleep cycles, sex drive, body temperature, coordination, heart rate and sweating.
The pituitary gland is responsible for the secretion of certain important hormones for the body while the Adrenal Gland produces hormones for the entire body and controls chemical reactions and the "fight or flight" response to stress.
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