A drug decreases heart rate by hyperpolarizing cardiac pacemaker cells. This drug probably binds to A drug decreases heart rate by hyperpolarizing cardiac pacemaker cells. This drug probably binds to muscarinic receptors. nicotinic receptors. alpha adrenergic receptors. beta receptors.

alpha adrenergic receptors or beta receptors.

beta-1 adrenergic receptor.

Explanation:

It is also known as ADRBI. It is a beta- adrenergic receptor. It is a receptor joined by a G-protein related with the GS heterotrimetric G-protein, it is shown more in the cardiac tissue. It is found in the heart. It helps to increase the rate of heart beat and also strengthens the rate of contractions in the heart.

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