Beta Receptor (Noun)
Meaning
Receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasodilation and increased heart beat).
Classification
Nouns denoting body parts.
Examples
- Beta receptors are stimulated by the catecholamines epinephrine and norepinephrine, which are released by the sympathetic nervous system.
- Activation of beta receptors by certain drugs can cause an increase in heart rate and contraction force of the heart.
- The beta receptor is divided into three subtypes beta-1, beta-2, and beta-3 receptors, which have different effects on the body.
- Drugs that selectively block beta-1 receptors are used to treat hypertension and angina by reducing heart rate and contraction force.
- The specific response to beta receptor stimulation varies depending on the location and subtype of the receptor.