Beta (β)-adrenergic receptor

Definition

Beta-adrenergic receptors are proteins located on the surface of cells within various tissues, such as the heart, lungs, and muscles, that bind to epinephrine and norepinephrine, triggering physiological responses related to the fight or flight response. These receptors play a crucial role in modulating cardiovascular function, respiratory rates, and metabolic processes under the influence of the sympathetic nervous system.

Related terms

Sympathetic Nervous System: The part of the autonomic nervous system responsible for controlling the body's fight or flight response, increasing alertness, energy expenditure, and preparing the body for action.

Epinephrine (Adrenaline): A hormone and neurotransmitter produced by the adrenal glands that plays a key role in the fight or flight response by increasing blood flow to muscles, output of the heart, pupil dilation, and blood sugar level.

Fight or Flight Response: A physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival, characterized by increased heart rate, energy levels, alertness, and readiness for physical activity