Biology · PYQ NEET UG 2019(2)
हिन्दीAll the components of the nodal tissue are auto-excitable. Why does the SA node act as the normal pacemaker?
Correct answer · Option 1
SA node has the highest rate of depolarisation.
Explanation
The SA node generates action potentials at the highest frequency among all nodal tissues, thus setting the pace as the natural pacemaker.