beta-adrenergic receptor

a receptor that binds norepinephrine. There are two main types, designated β₁ and β₂. The former mediate stimulation of heart muscle, causing a faster and stronger heartbeat. The latter are associated with relaxation of smooth muscle, causing (for example) dilation of blood vessels and widening of airways. Also called beta adrenoceptor; beta adrenoreceptor; beta receptor. Compare alpha-adrenergic receptor.

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Psychology term of the day

November 27th 2024

biological warfare

the use of agents such as bacteria, viruses, and toxins to incapacitate or destroy humans, nonhuman animals, or crops in war.