Answer:
a. True
Step-by-step explanation:
Beta blockers are called as the beta-adrenergic blocking agents. They are the medications which reduce the pressure of the blood.
These medications work by the blocking effects of hormone epinephrine which is also called as adrenaline.
They cause the heart to beat more slowly and also with less force, which as a result, lowers the blood pressure. They also help to open up the veins and the arteries to improve the blood flow.