Epinephrine

One of the catecholamines secreted by the adrenal gland and by neurons of the sympathetic nervous system. It is responsible for many of the physical manifestations of fear and anxiety. Also known as adrenaline.

A hormone from the adrenal gland that can increase the rate and pumping force of the heart, constrict some arterioles, and dilate other arterioles.

A hormone produced by the adrenal glands. Under stress stimulates the autonomic nervous system and glycogenolysis.

Hormone secreted by core of adrenal gland, also called adrenaline.

Epinephrine is a catecholamine also known as adrenaline that is produced in the adrenal glands from the metabolism of tyrosine. Classically speaking, epinephrine is known for its association with the fight or flight response. Release of epinephrine in situations of stress, such as exercise, shifts metabolism in ways that allow for the production of energy to drive chemical reactions. For example, initiation of exercise results in the release of epinephrine from the adrenal glands, which promotes mobilization of triglyceride-bound fatty acids stored within adipose tissue.

A hormone synthesized primarily in the adrenal medulla, mimicking the peripheral effects of norepinephrine. Epinephrine is involved in the sympathetic nervous system response to stress and is especially effective in stimulating cardiovascular function.

Hormone of the adrenal medulla that acts as a powerful stimulant in times of fear or arousal and has many physiological effects; these include increasing breathing, heart, and metabolic rates to provide quick energy, constricting blood vessels, and strengthening muscle contraction; also called adrenaline.

An adrenal hormone, somewhat elevated in certain psychiatric illnesses, and indicative of pheochromocytoma (a tumor of the adrenal gland) when sharply elevated.

A hormone secreted in the brain by the adrenal medulla; also known as adrenaline. Epinephrine is secreted in response to a low blood sugar level, exercise, and stress, causing increased cardiac output and other physiological changes known as the “fight-or- flight response.” Epinephrine can be produced synthetically for medical purposes.

An important hormone secreted by the medulla of the adrenal gland. It has the function of preparing the body for fright, flight, or fight and has widespread effects on circulation, the muscles, and sugar metabolism. The action of the heart is increased, the rate and depth of breathing are increased, and the metabolic rate is raised; the force of muscular contraction improves and the onset of muscular fatigue is delayed. At the same time the blood supply to the bladder and intestines is reduced, their muscular walls relax, and the sphincters contract. Sympathetic nerves were originally thought to act by releasing epinephrine at their endings, and were called adrenergic nerves. In fact the main substance released is the related substance norepinephrine, which also forms a portion of the adrenal secretion.

A catecholamine produced by the adrenal gland, secreted when the sympathetic nervous system is stimulated. In the physiological response to stress, it is responsible for maintaining blood pressure and cardiac output, keeping airways open wide, and raising blood sugar levels. All these functions are useful to frightened, traumatized, injured, or sick humans and animals. The therapeutic uses of epinephrine are diverse. As one of the key agents used in advanced cardiac life support, it is helpful in treating asystole, ventricular arrhythmias, and other forms of cardiac arrest. It counteracts the effects of systemic allergic reactions and is an effective bronchodilator. It helps control local hemorrhage by constricting blood vessels; because of this action, it prolongs the effects of local anesthesia.

One of the hormones released by the body in times of stress; also called adrenaline.

Also known as adrenaline; a catecholamine hormone secreted by the adrenal medulla that has a marked effect on the cardiovascular system, stimulates the release of glucose into the bloodstream, and increases the body’s metabolic rate.

The hormone secreted by the adrenal gland that produces the “fight or flight” response.

Commonly known as adrenaline, this hormone is a naturally produced substance discharged by the adrenal glands in reaction to signals originating from the sympathetic nervous system. These signals are provoked by stress, physical exertion, or emotions such as fear.