Norepinephrine increases calcium permeability in cardiac muscle cells and thus increases the heart's contractility.

Name: Norepinephrine increases calcium permeability in cardiac muscle cells and thus increases the heart's contractility.
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Question

Quizplus · Accepted Answer

Norepinephrine binds to beta-1 adrenergic receptors in the heart, which activates the second messenger system and increases calcium influx into the cardiac muscle cells. This leads to an increase in the contractility of the heart.

Norepinephrine Increases Calcium Permeability in Cardiac Muscle Cells and Thus