Which of These Statements Describes Action Potentials in the Heart

question 245

Multiple Choice

Which of these statements 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.