A : The resting heart rate, about 75/minutes, usually is lower than the autorhythmic rate of the SA node (90 - 100 beats/minute).
R : At rest condition, the parasymphathetic effects dominate.
A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).