Which of the following characteristics imparts autorhythmic cells with the ability to function myogenically? they have If channels which increase permeability to Na* at rest, causing depolarization to threshold the have prolonged action potentials due to the action of Ca2+ which causes a plateau during depolarization they have a threshold that is below their resting membrane potential their action potentials are controlled by mechanically-gated ion channels instead of voltage-gated channels the rising, depolarization, phase of their action potential is due to Ca2+ influx instead of Nat influx.

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