How nerve impulse is conducted

It specifically involves sodium and potassium ions.Nerve impulse is an overall physiological changes that occur in a neuron due mechanical, chemical or electrical disturbance created by a stimulus.The mechanism underlying the nerve impulse is the action potential, a phenomenon whereby the neuronal membrane depolarises and creates a current which in turn causes the depolarisation of nearby membrane areas.It propagation through axon, synapse and neuromuscular junction is called nerve impulse conduction.With myelination, impulses can move at speeds of up to 150 meters/second, whereas unmyelinated axons conduct impulses at velocities ranging from 0.5 to 10 meters/second.Each neuron receives an impulse and must pass it on to the next neuron and make sure the correct impulse continues on its path.

This nerve impulse propagates through the axon, synapse and, neuromuscular junction is called nerve impulse conduction.The signal is transmitted in the form of ions and therefore it is much faster than chemical synapses.The difference in charge is about 70 to 90 millivolts which is called as resting potential and the membrane is said to be polarized.Nerve impulse are conducted across the synapse with the help of chemical substances called neurotransmitter.The nerve goes through a brief refractory period before racing resting potential.Nerve impulses have a domino effect.