Question
Biology Question on Circulatory Pathways
All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?
A
SA node has the lowest rate of depolarisation.
B
SA node is the only component to generate the threshold potential.
C
Only SA node can convey the action potential to the other components.
D
SA node has the highest rate of depolarisation.
Answer
SA node has the highest rate of depolarisation.
Explanation
Solution
Answer (d) SA node has the highest rate of depolarisation.