1) What determines the direction of flow of impulse in nerve?
2) Which is the nerve arising from the ventral horn of spinal cord?
3) Give functions of : Node of ranvier, Nissl granules, Synapse.
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1.The nerve impulse flows in one direction only i.e. downwards from the axon. This is because of the polarization generated by sodium ions in the particular direction.
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Answer:
synapse is junction of two neurons
the gaps in myelin sheath are called nodes of ranvier
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