Multiple Choice
The absolute refractory period occurs because _______ channels cannot be opened, and the relative refractory period occurs because _______.
A) voltage-gated Na+; voltage-gated K+ channels cannot be opened
B) voltage-gated K+; voltage-gated Na+ channels remain open
C) voltage-gated Na+; voltage-gated K+ channels remain open
D) voltage-gated Na+; Na+-K+ pumps are activated
Correct Answer:
Verified
Correct Answer:
Verified
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