011 Hyperpolarization - the end of the action potential

In this video, Leslie Samuel discusses the final phase of the action potential, hyperpolarization. He explains how potassium ions exit the cell, aiming for an equilibrium potential of -93 millivolts, which is lower than the resting membrane potential of -70 millivolts. This process is termed hyperpolarization. The sodium-potassium pump then works to restore the membrane potential to its resting state by pumping sodium ions out and potassium ions in. The video concludes with a recap of the action potential phases and encourages viewers to leave questions in the comments.

Explain the role of potassium ions during the hyperpolarization phase.

What happens to the membrane potential during hyperpolarization compared to the resting membrane potential?

What is hyperpolarization and how does it relate to the action potential?

Describe the function of the sodium-potassium pump in maintaining membrane potential.

Summarize the phases of the action potential discussed in the video.