fill in the blank question\n\nthe ability to reach threshold without stimulation is called the of the sa node.
fill in the blank question\n\nthe ability to reach threshold without stimulation is called the of the sa node.
Answer
Brief Explanations:
The sinoatrial (SA) node acts as the primary pacemaker of the heart. Unlike typical neurons or skeletal muscle cells, the cells of the SA node do not have a stable resting membrane potential. Instead, they exhibit a gradual depolarization known as a pacemaker potential. This spontaneous depolarization is driven by the slow inflow of sodium ions through "funny" channels and the subsequent opening of calcium channels. This inherent property that allows the heart to beat independently of external nerve stimulation is known as pacemaker potential or autorhythmicity.
Answer:
pacemaker potential