Sinoatrial Node Cells

Sinoatrial node cells

A) Are normally the pacemakers of the heart
B) Exhibit spontaneous depolarization that is speeded by activation of their cholinergic receptors
C) Exhibit spontaneous depolarization that is speeded by activation of their beta-adrenergic receptors
D) Both are normally the pacemakers of the heart and exhibit spontaneous depolarization that is speeded by activation of their cholinergic receptors are correct
E) Both are normally the pacemakers of the heart and exhibit spontaneous depolarization that is speeded by activation of their beta-adrenergic receptors are correct