HP 127 Lecture Notes - Lecture 9: Atrioventricular Node, Qrs Complex, Sinoatrial Node
28 Mar 2019
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Clicker q: the pacemaker potential of cardiac conductance cells is due to: c- both funny na and type t ca channels. Clicker q: the part of the conduction system that causes ventricular depolarization is the: d- purkinje fibers. Clicker q: sympathetic nervous system would _____ the number of cardiac conductance cell action potentials per minute: Clicker q: parasympathetic nervous system would _____ the contractility of the left ventricle: c- not change contractility. Clicker q: if the sa node was ablated, the heart rate would be expected to _______: b- decrease other nodes, so it depolarizes faster- funny na channels) The next down is the av node, which auto-depolarizes at a rate of about 50 times per minute, which sets the heart rate. The sa node usually sets the heart rate at around 60 times per minute (in sa node, sodium flows in faster than the.
