All the components of the nodal tissue are autoexcitable. Why does the SA node act as the…
Biology · NEET · NTA Exams — Body Fluids and Circulation
All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?
- SA node has the highest rate of depolarisation
- SA node has the lowest rate of depolarisation
- SA node is the only component to generate the threshold potential
- Only SA node can convey the action potential to the other components
Answer
(A) SA node has the highest rate of depolarisation
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