Class 11 NEET Biology Body Fluids and Circulation

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Question : 21 of 107

Marks: +1, -0

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?

[NEET OD 2019]

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.
SA node has the highest rate of depolarisation.

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