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Biology
All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?
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Q. All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?
NEET
NEET 2019
Body Fluids and Circulation
A
SA node has the lowest rate of depolarisation.
15%
B
SA node is the only component to generate the threshold potential.
24%
C
Only SA node can convey the action potential to the other components.
28%
D
SA node has the highest rate of depolarisation.
33%
Solution:
Correct answer is (d) SA node has the highest rate of depolarisation.