After depolarization, the change in membrane potential triggers voltage-gated potassium channels to open. Due to the electrochemical gradient for potassium, potassium rushes out of the cell.

Get an overview of cell depolarization in our informative video lesson. Learn its properties and how it differs from repolarization, then take a quiz to review.

Learn about action potential and how to draw an action potential graph with depolarization and repolarization points. Understand what happens during depolarization.

Learn about the neuron diagram, structure, and function. Discover and discuss the meaning of dendrites, axon, membrane polarization, membrane depolarization, and synapses.

Explore the different types of summation in biology. Learn the definition of summation. Discover the differences between spatial summation and temporal summation.

Learn about the relative refractory period in a neuron. Understand the steps of generating an action potential and why the refractory period is important.

In the cardiac cycle, atrial contraction is followed by ventricular contraction. Answer and Explanation: 1 The correct answer is d. Ventricular depolarization occurs after atrial depolarization. The action …

An electrocardiogram (ECG) records the flow of electrical current on three distinct waves. Explore the purpose of an ECG, the three wave types, and...

Cardiac muscle has to contract to pump blood throughout the vascular system. This lesson covers the dynamics and physiological processes regulating cardiomyocyte contraction and the ion channels ...

The P-R interval includes atrial depolarization (and contraction), as well as the passage of the depolarization wave through the rest of the conduction system.