How nerve impulse is transmitted

Transmission of a signal within a neuron (from dendrite to axon terminal) is carried by a brief reversal of the resting membrane potential called an action potential.They diffuse across the synaptic gap, which is the small space present between the axon and the receptors.Sodium and potassium along an axon, calcium at the end of one neuron, neurotransmitters between them, and sodium in the beginning of the next one.This is where the transmission of a nerve impulse to another cell occurs.Transmission of signals internally between the cells is achieved through a synapse.

When the surface is stimulated the stimulated point becomes negative.Get a printable copy (pdf file) of the complete article (248k), or click on a page image below to browse page by page.The cell that sends the nerve impulse is called the presynaptic cell , and the cell that receives the nerve impulse is called the postsynaptic cell.Transmission of a nerve impulse along an axon.The membrane of an unstimulated neuron is polarized—that is, there is a difference in electrical charge between the outside and inside of the membrane.

A type of nerve cell that has a specific function to deliver messages to the brain is called a neuron.Now the action potential generate in second neuron.In medullated nerve fibres (white fibres), the impulse jumps from node to node, it is called saltatory propagation (fig.