The Rapid Depolarization Phase of a Pacemaker Cell Action Potential

question 67

Multiple Choice

The rapid depolarization phase of a pacemaker cell action potential is caused by movement of

• A)calcium through T- type channels.
• B)sodium through funny channels.
• C)potassium through funny channels.
• D)calcium through L- type channels.
• E)sodium and calcium through funny channels.

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