![a dendrite conducts nerve impulses a dendrite conducts nerve impulses](https://thumbs.dreamstime.com/z/axon-nerve-fiber-long-slender-projection-nerve-cell-neuron-conducts-electrical-impulses-away-101914184.jpg)
Ions (Na + and K +) as the electron particles.Axon acts as an electrical wire or loop.The signal propagation is faster in saltatory conduction as the nerve impulse plunges from one node to the next and reaches the target cell more quickly than the continuous conduction. It occurs in myelinated axons, where the flow of ions is discontinuous because of the uneven distribution of voltage-gated channels. It refers to the myelinated conduction, where the action potential plunges much faster (100 m/s) from one node to another. It occurs in unmyelinated axons, where the ions flow throughout the axon segment via voltage-gated channels. It refers to the non-myelinated conduction, where the flow of nerve-impulse is slower (0.1 m/s). All three factors accelerate the pace of signal transmission.Ĭontinuous and saltatory conduction are the two common modes that facilitate the propagation of nerve impulse. The transmission of nerve impulse generally speeds at 0.1-100 m/s.įactors like the temperature, axon diameter, and presence or absence of myelin insulating layer influence the rate of impulse transmission. It generates a change in the potential gradient of voltage-gated channels across the membrane, resulted from ionic movement in and out of the axolemma.Ī change in potential difference or the change in the phase of resting potential to the action potential leads to the conduction of the signal from one neuron to other. Nerve impulse refers to a signal driven by either electrical, chemical or mechanical stimulus onwards the segment of an axon filament. Besides, the functions of nerve impulse are explained. In this context, we will learn the definition, conduction mechanism (continuous and saltatory), and the steps involved in nerve impulse transmission.
![a dendrite conducts nerve impulses a dendrite conducts nerve impulses](https://www.easynotecards.com/uploads/878/38/_45a4fd19_1424c52d682__8000_00000835.png)
The layer of a fatty acid substance called myelin sheath accelerates the rate of signal conduction (up to 20 times faster). The size of nerve impulse remains the same, but its generation and transmission rate differs according to the cell type.