Question 1
The depolarization of the pacemaker action potential spreads from cell to cell through
◦ tight junctions.
◦ gap junctions.
◦ desmosomes.
◦ chemical synapses.
Question 2
The fibrous skeleton of the heart is important because it
◦ helps guide the blood into the proper chambers in sequence.
◦ transmits electrical activity from the atria to the ventricles.
◦ directs the flow of blood into the arteries.
◦ forces electrical activity to be conducted through the atrioventricular node.