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This is because there is less resistance facing the ion flow. Generation of Nerve Impulse. Impulse Conduction In Axons Youtube The different types of ion channels present on the neural membranes help in the generation of impulses. Generation and conduction of nerve impulse khan academy . Nerve membrane is electro positive outside and electro negative on inner side such a state is called polarised. This speed up the conduction process and this type of conduction is known as Saltatory conduction. The nerve impulse is the sum of mechanical chemical and electrical disturbances created by a stimulus in a neuron. The ions are moved in and out of the cell by potassium channels sodium channels and the. It is because the myelin sheath act as insulator so that the impulse have to jump from one node of Raniver to another. Larger diameter axons have a higher conduction velocity which means they are able to send signals faster. Respiratory System Khan Academy. In the neuron an