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What is the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector)?

What is the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector)? Correct Answer Synapse

The Correct Answer is "Synapse".

Important Points

Synapse :

  • The site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). 
  • In the central nervous system, a synapse is a small gap at the end of a neuron that allows a signal to pass from one neuron to the next.
  • Synapses are found where nerve cells connect with other nerve cells.
  • Synapses are vital to the transmission of worried impulses from one neuron to some other.

Additional Information

Dendrite :

  • Dendrites are projections of a neuron (nerve cell) that receive signals (information) from other neurons.
  • The transfer of information from one neuron to another is achieved through chemical signals and electric impulses, that is, electrochemical signals.
  • The information transfer is usually received at the dendrites through chemical signals, then it travels to the cell body (soma), continues along the neuronal axon as electric impulses, and it is finally transferred onto the next neuron at the synapse, which is the place where the two neurons exchange information through chemical signals.

Axon :

  • Axon, also called nerve fiber, a portion of a nerve cell (neuron) that carries nerve impulses away from the cell body.
  • A neuron typically has one axon that connects it with other neurons or with muscle or gland cells.
  • Some axons may be quite long, reaching, for example, from the spinal cord down to a toe.
  • Most axons of vertebrates are enclosed in a myelin sheath, which increases the speed of impulse transmission; some large axons may transmit impulses at speeds up to 90 meters (300 feet) per second.

Myelin sheath :

  • Myelin is an insulating layer or sheath that forms around nerves, including those in the brain and spinal cord.
  • It is made up of protein and fatty substances.
  • This myelin sheath allows electrical impulses to transmit quickly and efficiently along with the nerve cells.
  • If myelin is damaged, these impulses slow down.
  • This can cause diseases such as multiple sclerosis.

                                                                                                  

 

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