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PTECH Physiology QUESTION #3186
Question 1
During 'Depolarization' of an action potential, which ion rushes into the cell?
  • $K^+$
  • $Na^+$✔️
  • $Ca^{2+}$
  • $Cl^-$
Correct Answer Explanation
Opening of voltage-gated sodium channels allows $Na^+$ to enter, making the membrane potential more positive.