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Question 1
2 pts
Which of the following is/are TRUE concerning the effects of the parasympathetic system on cardiac
function?
Q. Firing of the parasympathetic system decreases SA node activity and heart rate
O Firing of the parasympathetic system decreases the strength of myocardial contraction
O Firing of the parasympathetic system increases the speed at which the cardiac impulse travels from the SA
node to and through the AV node
O All of the above