Cells That Spontaneously Depolarize from Resting Membrane Potential to Threshold

Question

Cells that spontaneously depolarize from resting membrane potential to threshold potential
A) are called pacemaker cells.
B) normally "live" within the chordae tendineae.
C) are restricted to the SA node.
D) are stored within the pericardium.

Accepted Answer

These cells are called pacemaker cells, and they are responsible for initiating the electrical impulses that regulate the heartbeat. They are found in several areas of the heart, including the SA node, AV node, and Purkinje fibers. They are not restricted to the chordae tendineae or pericardium.