What are the different components of neve cell and how do they function?
Answers
1. Cyton/Cell body : It consists of a central nucleus and cytoplasm (neuroplasm) with characteristic deeply stained particles, called Nissl's granules. (Nissl's granules are large and irregular masses of ribosomes and RER)
2. Dendrites : These are short and branched processes arising from the cyton. They carry impulse towards the cell body.
3. Axon : It is a single long cylindrical projection emerging from cyton. The axon ends in a group of branches (axon ending), termed as terminal arborizations. Nissl's granules are absent in axon. The axon carries messages away from the cyton.
4. Synapse : The terminal arborization of axon of one neuron is very closely placed to the dendrites of another neuron to carry impulses from one neuron to another neuron. This close proximity is called synapse .
Axon is surrounded by a sheath (neurilemma) formed by neuroglial cells called Schwann cells. This sheath is called myelin sheath which is a discontinuous covering and is absent at Nodes of ranvier.
- A neuron typically consists of three basic parts :cyton ,dendrites and axon
- Cyton:it is also called cell body or perikaryon. it has a central nucleus with abundant cytoplasm called neuroplasm . the cytoplasm has large granular body called Nissl'sgranules and the other cell organelles like mitochondria,ribosomes,lysozymes,and endoplasmic reticulum. neurons do not have the ability to divide. several neurofibers are present in the cytoplasm that help in transmission of nerve impulses to and from the cell body
- Dendrites: these are the numerous branched cytoplasmic processes that project from the surface of the cell body they conduct nerve impulses towards............. ( wait guys it is still pending)........