The Plateau Phase of an Action Potential

question 30

Multiple Choice

The plateau phase of an action potential

• A) occurs only in skeletal muscle and makes those fibers' contractions most forceful.
• B) leads to tetanic contractions in smooth and skeletal muscle.
• C) allows cardiac muscle cells to contract and then relax without locking up.
• D) allows cardiac muscle cells to exhibit synchronous fibrillation.

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