Beta Adrenergic Blockade

Question

Beta adrenergic blockade
A) dilates the respiratory bronchioles and therefore relieves the symptoms of asthma.
B) is apt to induce tachycardia.
C) decreases heart rate but also causes bronchoconstriction.
D) mimics sympathetic outflow.

Accepted Answer

Beta-adrenergic blockers decrease heart rate by blocking the effects of the hormone epinephrine, also known as adrenaline. While they are effective in reducing heart rate and blood pressure, they can also cause bronchoconstriction by blocking beta-2 adrenergic receptors in the lungs, which can worsen respiratory conditions like asthma.