Which of the following statements about beta-adrenergic blocking medications are true?- beta blockade reduces the vigor of ventricular contraction.- All of these answers are correct. – beta blocking drugs reduce heart rate during exercise.- beta blocking drugs compete with epinephrine and norepinephrine for beta-adrenergic receptors in the heart.
All of these answers are correct.
All of these answers are correct. Beta-adrenergic blocking medications, also known as beta blockers, reduce the heart rate during exercise and reduce the vigor of ventricular contraction. They work by competing with epinephrine and norepinephrine for beta-adrenergic receptors in the heart. This reduces the effects of these hormones, which are responsible for increasing heart rate and causing the heart to contract more forcefully. By blocking these effects, beta blockers can help to reduce blood pressure and prevent arrhythmias.
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