BIO310H5 Lecture Notes - Lecture 14: Stroke Volume, Resting Potential, T Wave
Document Summary
We need the av node to capture the action potential, generate pacemaker potential, and transmit it to. One part of the atria, the av node will receive the action potential, but it doesn"t contract; it conducts the. Pacemaker cells are target muscles but are less contractile because they"re more concerned with generating action potentials; contractile cells can generate action potentials, but they aren"t as concerned. One sub-bundle goes to each of the ventricles (purkinje fibers) with this as they are will generating and maintaining muscle contractions cardiac muscles can be pacemaker cells or contractile cells. Impulse conduction in heart stimulus spreads across the atrial surfaces and reaches the av node. Time = 50 msec: sa node activity and atrial activation begin. Time = 0: the impulse travels along the interventricular septum within the av bundle and the bundle branches to there is a 100 msec delay at the av node.
