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Tardigrade
Question
Biology
All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?
Q. All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?
12080
208
NEET
NEET 2019
Body Fluids and Circulation
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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.