I am doing physiology lab homework and im struggling a bit with the cardiovascular system. There is a question that says in the absence of influences, the SA node generates Action Potentials at 100 beats per min. But the average beats per min. is 70. and it is asking what this tells me about the parasympathetic nervous system in realtion to sympathetic nervous system.
I understand that the parasympathetic slows down the heart and that sympathetic speeds it up and that they both work on the heart in sort of a tug and pull thing….but does the above senerio mean that the parasympathetic nervous system has a greater influence on the heart rate?