Which of These Statements Correctly Describes Action Potentials in the Heart

question 130

Multiple Choice

Which of these statements correctly describes action potentials in the heart?

• A)The rising phase of the action potential in cardiac autorhythmic cells is due to a rapid Ca²⁺ influx.
• B)The rising phase of the action potential in cardiac contractile cells is due to a rapid K⁺ influx.
• C) The plateau phase of the action potential in cardiac contractile cells is due to a rapid Ca²⁺ influx.
• D) The plateau phase of the action potential in cardiac contractile cells is due to a rapid K⁺ influx.

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