Respuesta :
The answer is potassium
The transmembrane potential becomes increasingly negative when positively charged potassium ions exit the cell, repolarizing the membrane in the direction of its resting potential.
What is repolarization?
- The gradual shutting of sodium channels and the activation of voltage-gated potassium channels result in the repolarization or falling phase.
- The membrane's permeability to sodium, therefore, decreases to resting values.
- A step of an action potential known as repolarization occurs when the cell experiences a drop in voltage as a result of the outflow of potassium (K+) ions along its electrochemical gradient. This stage follows the cell's greatest depolarization-induced voltage.
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