Cardiac action potentials: ionic mechanims and sympathetic regulation скачать в хорошем качестве

Cardiac action potentials: ionic mechanims and sympathetic regulation

Cardiac action potentials are shaped by multiple ion channels that respond to changes in membrane potential by mediate the ion fluxes that depolarise or repolarise the cell. In this video, I explain 1. how the action potentials in muscle cells differ from the pacemaker cells of the sinoatrial and atrioventricular nodes. 2. the ion channels and permeabilities responsible for each phase of the action potentials 3. how sympathetic neurotransmission affects cardiac channels to increase the rate and force of the heartbeat. 0:00 Action potentials at different locations in the heart 2:25 The muscle action potential 5:17 ion permeability during muscle action potential 7:57 pacemaker cell action potential 10:25 ion permeability during the pacemaker action potential 12:58 sympathetic regulation #cardiac #actionpotential #funnychannel #cardiaccycle