Neuron structure and its types.

Neuron and its Types

Neuron is the functional and structural unit of nervous system.

Properties of neuron

• ·         Ability to respond to stimulus.
• ·         Ability to conduct a signal.

Structure of neuron

 There are three main parts of neuron body.

• Dendrites (short thread-like projections which conduct nerve impulse towards cell                    body).
• Cell body (cytoplasm having large central nucleus)
• Axon (long, cylindrical process that conducts nerve impulse away from nerve impulse.

Myelin sheath

It is the laminated lipid sheath which covers axons. Neurolemmocytes wraps myelin sheath in layers and neurofibril nodes separates the myelin sheath at regular intervals.

Types of neurons;

Sensory Neurons

The neurons that carry information from receptors or may act as receptor for detecting stimulus are called sensory (receptors or afferent) neurons. They carry nerve impulse to inter neurons present in the brain.

                                        

                                                

Inter Neurons

These neurons are integrating centers where information present in the impulse is processed and then these neurons send this processed information is send to effectors through motor neurons.  

                                          

Motor Neurons

Motor neurons are those neurons which carry processed information in the form of nerve impulse to effectors which in result response.