Question

how does nerve impulse get generated and conducted in human body

Answer 1

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$\underline\bold{\huge{ANSWER \: :}}$

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(A) INTRODUCTION AT BEGINNING

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◼ The nervous system is made up of two major types of cells known as neurones and neuroglia.

◼ Neurones are the basic structural and functional units of the nervous system.

◼ Neuroglia is commonly known as glial cells are the non-neuronal cells of the nervous system which are important to maintain the homeostasis as well as to form myelin.

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(B) GENERATION OF NERVE IMPULSES

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◼ Neurone which is the basic structural and functional unit of a nerve is generally responsible for the generation and transmission of nerve impulses.

◼ Axons are specialised for the conduction of nerve impulses from the cell body (or soma) towards the axon terminals (or axon endings).

◼ Myelin Sheath is responsible for increasing the speed (or rate) at which the nerve impulses propagate along the nerve fibre.

◼ The Nodes of Ranvier allow nerve impulses to move along the neurone through a process of depolarisation of the nerve membrane.

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(C) CONCLUSION AT THE END

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◼ Neurones are readily excitable to transmit and generate the messages (or informations) inside the bodies of animals.

◼ The signalling or signal passing process is carried out by neurone through both electrical and chemical means.

◼ Axon receives the propagated nerve impulse from the cell body or soma.

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