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 (bā′tə-rĭ-sĕp′tər, bē′-)
A site in the autonomic nervous system in which inhibitory responses occur when adrenergic agents, such as norepinephrine and epinephrine, are released. Activation of beta-receptors causes various physiological reactions, such as relaxation of the bronchial muscles and an increase in the rate and force of cardiac contraction. Also called beta-adrenergic receptor.
References in periodicals archive ?
There are numerous classes of medications used to treat high blood pressure; they include diuretics, angiotensin-converting enzyme inhibitors (ACEIs), angiotensin receptor blockers (ARBs), calcium channel blockers (CCBs), beta-receptor blockers, and alpha-receptor blockers.
Among specific topics are autonomic pharmacology and stress, beta-receptor antagonists (beta-blockers), psychotherapeutic agents, analgesic and anti-inflammatory drugs, dietary supplements, and performance-enhancing substances.
Racepinephrine is an alpha- and beta-receptor stimulant that works by widening the air passage and making it easier to breathe.
The new study unveiled an elegant intracellular signalling system in which beta-receptor activation modulates alpha-adrenergic signaling.
Glucocorticoids enhance beta-receptor stimulation by increasing the number and availability of beta receptors on the cell surfaces and by increasing affinity of the receptor for beta agonists.
3) Beta blockers prevent the flow of adrenalin to the beta-receptor sites in the autonomic nervous system.
Although further investigation is required to examine the mechanism of action of propranolol in curing aphthous ulcers, our working hypothesis is that beta-receptor inhibition may be crucial in alleviating one of the most important predisposing factors, namely stress," he said.
These agents are partial beta-receptor agonists and, thus, do not affect resting heart rate, cardiac output, and peripheral blood flow.
In patients with obstructive lung disease and cardiac arrhythmia, bronchodilating agents such as beta-receptor agonists or theophylline preparations have been reported to induce supraventricular tachyarrhythmias (23,24).