Question

generation and conduction of nerve impulses?​

Answer 1

Answer:

neurones were the structural and functional unit of nervous system of humans and animals . the ability of neurone generate and conduct impulses make them special. The different type of ion channels present in the neural membrane help in the generation of impulses.

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Answer 2

Answer:

Nerve impulse refers to the temporary changes that occur in the neuron due to the disturbance created by the stimulus of adequate strength. This nerve impulse propagates through the Axon, synapse and, neuromuscular junction is called Nerve Impulse conduction.

Explanation:

mechanism of generation and conduction of nerve impulse :-

• When a stimulus is applied at a site on the polarised membrane, the membrane at the site A becomes freely permeable to Na+, which leads to a rapid influx of Na+ followed by the reversal of the polarity at that site, and the membrane is depolarised.

• The electric potential difference across the plasma membrane is called action potential.

• Depolarisation is followed by the increase in permeability of K+ to the membrane leading to change in polarization and the process is called repolarisation, and the membrane is repolarised.

• During depolarisation, the outer surface of the membrane becomes negatively charged and the inner side becomes positively charged.

• During repolarisation, outside of membrane becomes positively charged and inside becomes negative.

• Regain of resting potential takes place due to action of NA+/K+ ATPase enzyme, which transports three Na+ inside and two K+ with expense of one ATP.

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