Membrane Potentials in Smooth Muscle || Spike Potential, Plateau, Slow Wave, Junctional Potential

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Membrane Potentials in Smooth Muscle: Spike Potential, Plateau, Slow Wave, Junctional Potential:
Different smooth muscles show different types of membrane potentials.
Spike potentials are similar to those seen in skeletal muscles.
And they occur in most unitary smooth muscles.
Action potential with plateau, allows prolonged contraction, in the gastrointestinal tract, ureter, uterus, etc.
Slow wave potentials are rhythmic oscillations in the membrane potential.
They do not spread themselves or cause contraction.
But they elicit action potentials repetitively, which causes rhythmic contraction of muscles, as seen in the gut.
Finally, the junctional potential is seen in small multi-unit smooth muscle fibers, like those in the iris and piloerector muscles.
In this, local depolarizations cause muscle contraction, without action potential.
Chapters:
00:00 Intro
00:19 Types of Membrane Potentials in Smooth Muscle
00:55 Action Potential: Spike Potential & Action Potential with Plateau
03:09 Slow Wave (Pacemaker Potential)
04:46 Junctional Potential
05:37 Summary
Dr Vipul Navadiya
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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