Generation of an action potential across a sarcolema

What are the three steps involved in triggering and then propagating an action potential

Generaton of an end plate potential, folowed by an action potential depolarization, then repolarization

What is the first step in generating an action potential across the sarcolema

An end plate potential is generated at the neuromuscular junction. This creates a wave of depolarization that spreads

What is the second step in generating an action potential across the sarcolema

Depolarization: generating and propagating an action potential. Opens voltage-gated channels, allowing Na+ to enter. This continues across the sarcolema

What is the third step in generating an action potential across the sarcolema

Repolarization: restoring the sarcolema to its initial polarized state (negative inside, positive outside). The voltage gated Na+ channels close, and voltage-gated K+ channels open.

What is the refractory period

During repolarization when the cell cannot be stimulated until repolarization is complete.

What does repolarization restore

the resting electrical conditions of the neuron

What restores the ionic conditions of the cells

The atp-dependent sodium potassium pump

Is the action potential stoppable

No. it is also an all-or-none response