Question

place in the correct order the sequence of events resulting in the action potential for cardiac muscle cells. instructions depolarization causes the opening of voltage - gated k+ channels plateau occurs voltage - gated ca2+ channels close na+ ions enter causing depolarization repolarization occurs, returning the cell to the resting membrane potential

Explanation:

The action potential in cardiac muscle cells starts with the influx of Na+ ions causing depolarization. This depolarization leads to the opening of voltage - gated K+ channels and also triggers the plateau phase due to the opening of voltage - gated Ca2+ channels. Eventually, voltage - gated Ca2+ channels close and repolarization occurs as the cell returns to the resting membrane potential.

Answer:

1. Na+ ions enter causing depolarization
2. depolarization causes the opening of voltage - gated K+ channels
3. plateau occurs
4. voltage - gated Ca2+ channels close
5. repolarization occurs, returning the cell to the resting membrane potential