Q:

What feature distinguishes pacemaker cardiac cells from other cardiac cells? Pacemaker cardiac cells:

waelhammad
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2022-10-18
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What feature distinguishes pacemaker cardiac cells from other cardiac cells? Pacemaker cardiac cells:

  1. require a stimulus from the vagus nerve in order to reach threshold; other cardiac cells do not.
  2. reach threshold with much weaker stimuli than other cardiac cells
  3. have gap junctions, while other cardiac cells do not
  4. do not require an external stimulus to reach threshold, while other cardiac cells do.
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waelhammad
2022-10-18
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D: Pacemaker cardiac cells are self-rhythmic. They will contract in the absence of stimulation from the nervous system. External stimulation will make them contract at a faster (or slower) rate.

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