Action Potentials and Contraction in Cardiac Muscle Cells

Leslie Samuel discusses action potentials and muscle contraction in cardiac cells. The episode covers the electrical connections in heart cells, the role of the SA and AV nodes, and the conduction velocity of signals. It explains how signals spread through the heart, causing the atria and ventricles to contract in sequence. The video also details the action potentials in cardiac muscle cells, highlighting the role of calcium in prolonging the action potential and facilitating muscle contraction.

How does calcium release affect the contraction of cardiac muscle cells?

What is the plateau phase in cardiac action potentials, and why is it important?

Discuss the sequence of events that lead to muscle relaxation in cardiac cells.