What Are Adrenergic Receptors?
Adrenergic receptors are proteins which are sensitized to particular chemical compounds. Certain types of cells contain these proteins along with others to enable cellular signaling, in which cells communicate with each other through the use of chemical signals. These proteins are most sensitive to norepinephrine and epinephrine, two neurotransmitters involved in the function of the sympathetic nervous system. The famous “fight or flight syndrome” experienced by people under stress is mediated by the adrenergic receptors. These proteins can stimulate a number of responses which trigger muscle contractions, are involved in certain secretions, and modulate blood pressure.
