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How does a nerve impulse travel through ...

How does a nerve impulse travel through the body ?

Text Solution

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1) The information acquired at the dendritic tip of a nerve cell sets off a chemical reaction that creates an electrical impulse.
2) This impulse travels from the dendrite to the cell body and then along the axon to its end.

3) At the end of the axon the electrical impulse sets off the release of some chemicals.
4) These chemicals cross the gap or synapse and start a similar electrical impulse in a dendrite of the next neuron.
5) A similar synapse finally allows the delivery of such impulse from neurons to other cells such as muscles or glands.
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Knowledge Check

  • During the transmission of nerve impulse through a nerve fibre, the potentila on the inner side of the plasma membrane has which type of electric charge?

    A
    First positive, then negative and again back to positive
    B
    First negative, then positive and again back to negative
    C
    First positive, then negative and continue to be negative
    D
    First negative, then positive and continue to be positive

  • Hydra receives impulses and stimuli through

    A
    nerve net
    B
    nematocytes
    C
    sensory cells
    D
    neuron cells.

  • The position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. The time between two consecutive impulses received by the body, the magnitude of each impulse is:

    A
    4 sec, `4 xx 10^(-4)` kg m/s
    B
    2 sc, `8 xx 10^(-4)` kg m/
    C
    6 sec, `4 xx 10^(-4)` kg m/s
    D
    8 sec, `8 xx 10^(-4)` kg ms

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    What carries the nerve impulse to the spinal cord?

    A body .A. with a momentum .P. collides with another identical stationery body .B. gives an impulse .J. to the body .A.. Then the coefficient of restitution is

    A body .A. with a momentum .P. collides with another identical stationery body .B. one dimensionally. During the collision. .B. gives an impulse .J. to the body .A.. Then the coefficient of restitution is

    During the propagation of a nerve impulse. the action potential results from the movement of :

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