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Video Summary:
Action potential at any region brings the voltage to the threshold in the nearby region. So voltage-gated Na channels open and action potential is generated in that area also. In this way, the action potential spreads in all directions away from the point of stimulus. Its amplitude remains the same as it spreads. In myelinated fiber, the axon is insulated by Schwann cells or oligodendrocytes. They have uncovered areas at regular interval called nodes of Ranvier. Here the action potential jumps from node to node. It's called saltatory conduction and it's fast and energy-efficient.

🎞 More videos on membrane physiology:
• Origin of Resting Membrane Potential: https://youtu.be/V7cUNZiAnDk
• Generation of Action Potential: https://youtu.be/dZdj124i9Gw
• Transport Proteins: https://youtu.be/A9ihz5gYxU4
• Primary vs Secondary Active Transport: https://youtu.be/N-iBdwtQn4Q
• Transport Through The Cell Membrane: https://youtu.be/Vog-NMBNBKo
• Na-K-ATPase Pump: https://youtu.be/nSH8qce-epw
• Transport Across Epithelium: https://youtu.be/qgCTfCbug0E

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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.