The Cardiomyocyte Action Potential [Part 2]: Physiological Events in Cell

The video tutorial explains the action potential in cardiac muscle cells, focusing on the role of gap junctions in facilitating rapid ion movement. It details the physiological events within cardiomyocytes, including the changes in membrane potential and the opening of voltage-gated channels. The tutorial covers the plateau phase, highlighting calcium-induced calcium release from the sarcoplasmic reticulum, and concludes with the repolarization process and the mechanisms for calcium removal to prevent tetany in heart cells.

What is the role of gap junctions in cardiac muscle cells?

Describe the physiological changes that occur in a cardiomyocyte during an action potential.

Discuss the importance of maintaining a negative resting membrane potential in cardiomyocytes.

What happens to the membrane potential of a cardiomyocyte when positively charged ions enter the cell?

How do voltage-gated sodium channels contribute to the action potential in cardiomyocytes?

Explain the significance of the plateau phase in cardiac muscle contraction.

How does the influx of calcium ions affect the contraction of cardiomyocytes?

What is calcium-induced calcium release and how does it differ from skeletal muscle contraction?

What are the consequences of calcium remaining in the sarcoplasm after contraction?

What mechanisms are involved in the removal of calcium from the sarcoplasm during repolarization?