In autorythmic SA nodal cells, the pacemaker potential is caused by the opening of "fast" voltage-gated K+ channels.
True or False
1
Expert's answer
2016-03-18T15:48:04-0400
The right answer is false. (The pacemaker potential is caused by the opening of pacemaker Na+ channels, the closing of K+ channels, and (late in the process) the opening of Ca2+ channels. Besides, there are no fast voltage-gated Na+ and K+ channels in the pacemaker cells.
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