The plateau phase of the action potential in a contractile cardiac muscle cell occurs as a result of activation of slow Ca²⁺ channels.

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The plateau phase of the action potential in a contractile cardiac muscle cell occurs due to the activation of slow Ca²⁺ channels. These channels play a crucial role in maintaining the prolonged depolarization phase of the cardiac action potential, which contributes to regulating cardiac muscle contraction and relaxation.

The Plateau Phase of the Action Potential in a Contractile