The Rising Phase of an Action Potential Is Due to the

question 77

Multiple Choice

The rising phase of an action potential is due to the

• A) closing of K⁺ channels.
• B) opening of chemically gated Na⁺ channels.
• C) closing of voltage-gated Ca²⁺ channels.
• D) opening of voltage-gated Na⁺ channels.
• E) spread of positive current along the plasma membrane.

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