Is the resting membrane potential

- is a period during which inward and outward currents are equal and the membrane potential approaches the K+ equilibrium potential.

- is normally the pacemaker of the heart.

- does not have a constant resting potential.

- exhibits phase 4 depolarization, or automaticity.

- The AV node and the His-Purkinje systems are latent pacemakers that may exhibit automaticity and override the SA node if it is suppressed.

- The intrinsic rate of phase 4 depolarization (and heart rate) is fastest in the SA node and slowest in the His-Purkinje system:

Anxiety and Depression 101

Anxiety and Depression 101

Everything you ever wanted to know about. We have been discussing depression and anxiety and how different information that is out on the market only seems to target one particular cure for these two common conditions that seem to walk hand in hand.

Get My Free Ebook


Post a comment