Question

explain the transflrmation of nerve impulses from one neuron to another

Answer 1

The nervous system is made up of nerves. A nerve is a bundle of nerve cells. A nerve cell that carries messages is called a neuron (Figure below). The messages carried by neurons are called nerve impulses. Nerve impulses can travel very quickly because they are electrical impulses.

Think about flipping on a light switch when you enter a room. When you flip the switch, the electricity flows to the light through wires inside the walls. The electricity may have to travel many meters to reach the light, but the light still comes on as soon as you flip the switch. Nerve impulses travel just as fast through the network of nerves inside the body.

The axons of many neurons, like the one shown here, are covered with a fatty layer called myelin sheath. The sheath covers the axon, like the plastic covering on an electrical wire, and allows nerve impulses to travel faster along the axon. The node of Ranvier, shown in this diagram, is any gap in the myelin sheath; it allows faster transmission of a signal.

Answer 2

All the information from the environment is received by the specialised tips of some nerve cells and are known as receptors. They are usually located in the sense organs such as inner ear,nose ,tongue etc.

This information which is acquired at the dendritic tip of the nerve cell set off a chemical reaction that creates an electrical impulse which travels from the dendrite to the cell body and then along the axon to its end. At the end of the axon ,this impulse sets off the release of some chemicals which cross the synapse and start a similar electrical impulse in the dendrite of the next neuron.This is how nervous impulse travels in our body