Which statement accurately describes the resting membrane potential of contractile cells in the heart?

Atrial cells have a resting potential of -80 mV, while ventricular cells have a resting potential of -90 mV

Both atrial and ventricular cells have a resting potential of -70 mV

Atrial cells have a resting potential of-90 mV, while ventricular cells have a resting potential of -80 mV

Both atrial and ventricular cells have a resting potential of-60 mV