Stimulation of beta-adrenergic receptor sites will result in peripheral vasoconstriction.

Question

Quizplus · Accepted Answer

Beta receptor sites are divided into beta1 and beta2. Beta1 receptors are found in the heart and kidneys. Stimulation of beta1 receptor sites in the heart results in increased heart rate, contractility, and ultimately irritability of cardiac cells. Stimulation of beta1 receptor sites in the kidneys results in the release of renin into the blood. Renin promotes the production of angiotensin, a powerful vasoconstrictor. Beta2 receptor sites are found in the arterioles of the heart, lungs, and skeletal muscle. Stimulation results in dilation. Stimulation of beta2 receptor sites in the smooth muscle of the bronchi results in dilation.

Stimulation of Beta-Adrenergic Receptor Sites Will Result in Peripheral Vasoconstriction