Special Characteristics of Smooth Muscle Contraction as Compared Skeletal Muscle Contraction

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Special Characteristics of Smooth Muscle Contraction vs Skeletal Muscle Contraction:
The mechanism of control of smooth muscle contraction is different from skeletal muscle.
Side-polar cross-bridges allow more shortening of smooth muscles, as compared to skeletal muscles.
The duration of the myosin cross-bridge cycle, especially the attached state is longer in smooth muscles.
Because of this, the onset of contraction, and relaxation is slower.
And smooth muscles can maintain high force at low energy consumption for a long time, a mechanism called latch state.
And finally, stress-relaxation of smooth muscles allows hollow organs, to maintain relatively constant pressure inside their lumens, despite significant changes in volume over sustained periods.
Chapters:
00:00 Intro
00:25 Excitation Contraction Coupling & Control of Contractile Process
00:48 Side-polar Cross Bridges vs Bipolar Cross Bridges
01:52 Slower Myosin Cross Bridge Cycle
02:26 Slow Onset of Contraction and Relaxation
02:44 Latch State (High Force at Low Energy)
04:17 Stress Relaxation
05:3 Summary
Dr Vipul Navadiya
Nonstop Neuron
DISCLAIMER: This video is for education purposes only. Although every effort is made to ensure the accuracy of the material, viewers should refer to the appropriate regulatory body/authorized websites, guidelines, and other suitable sources of information as deemed relevant and applicable. In view of the possibility of human error or changes in medical science, any person or organization involved in the preparation of this work accepts no responsibility for any errors or omissions, or results obtained from the use of information in this video.

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There are separate videos for that