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Spread of Impulse & Excitation Contraction Coupling in Cardiac Muscle:
Electric activity in one cardiac cell is transmitted to the next by gap junctions at the intercalated discs.
The calcium entering from the extracellular fluid, causes the release of calcium from the sarcoplasmic reticulum as well.
The calcium binds with troponin C, and initiates the crossbridge cycle, producing contraction.
To terminate the contraction, sodium and calcium are removed from the cytosol, producing relaxation.

Chapters:
00:00 Intro
00:30 Schematic Diagram of Cardiomyocyte
01:17 Spread of Impulse & Role of Gap Junctions
02:18 Excitation Contraction Coupling
03:36 Termination of Process
04:11 Summary

Dr Vipul Navadiya
Nonstop Neuron
Medical Animation
Medical Animation Videos
Physiology

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