Curated Video
Action Potentials and Contraction in Cardiac Muscle Cells
In this episode, I show how the Action potential is generated in cardiac muscle cells and how this results in Contraction of the Heart. When the action potential happens, calcium ions are released from the Sarcoplasmic reticulum, causing...
Khan Academy
Khan Academy: Heart Muscle Contraction: Three Types of Muscle
Find out what makes smooth muscle, cardiac muscle, and skeletal muscle similar and different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.
Khan Academy
Khan Academy: Heart Muscle Contraction: Calcium Puts Myosin to Work
See exactly how calcium binds troponin-C and allows myosin to do some work. Rishi is a pediatric infectious disease physician and works at Khan Academy. [10:03]
Khan Academy
Khan Academy: Heart Muscle Contraction: Heart Cells Up Close!
Get a close-up view of the cardiac cells and see what makes them different from the other cells in this video lecture. Understand the parts of the heart cells that make it unique and able to carry out contractions. [14:00]
Khan Academy
Khan Academy: Heart Muscle Contraction: Sympathetic Nerves Affect Myosin
Check out how the amount of Myosin that is tugging on your heart can change depending on your activity level. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:02]