Lec16-15 - pacemaker potential Both actions combined result in a shorter duration of the action potential which leads to a decreased cardiac

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KIN 205: Chapter 14, Cardiovascular Physiology: Figure 14-16b ACh activates muscarinic cholinergic receptors and acts by: 1. Increasing the K + conductance (increased K + efflux) resulting in hyperpolarization of the pacemaker cells, 2. Decreasing the Ca 2+ current (decreased Ca2+ influx) which slows the depolarization rate of the
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Unformatted text preview: pacemaker potential. Both actions combined result in a shorter duration of the action potential which leads to a decreased cardiac output (decreased heart rate). E.4 Autonomic control of Autorhythmic cells: Parasympathetic system: Effects on the autorhythmic cells (SA node):...
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This note was uploaded on 12/26/2011 for the course KIN 205 taught by Professor Blaber during the Fall '09 term at Simon Fraser.

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