Question
Describe the structure of a nerve cell.
✓
Answer
The cells of the nervous tissue are called nerve cells or neurons. A neuron or nerve cell is structural and functional unit of the nervous tissue. It consists of:
Cell body or cyton has a prominent nucleus and cytoplasm. Cell organelles like golgi bodies, mitochondria, etc are also present in the cytoplasm. From the cell body extend out two kinds of cytoplasmic extensions called dentrites and axons. The axon is covered by a fatty myelin sheath. Myelin sheath is discontinuous and broken at intervals by nodes of Ranvier. Axons usually a long, unbranched, cylindrical process that ends in many terminal end fibres. The axon ending of one nerve cell is lossely placed on the cell body of another nerve cell. The other small branch given out by the cyton are called dendrons which branch further into numerous thin hair-like dentrites.
- Cell body or cyton.
- Axon.
- Dendrons or dentrites.
Cell body or cyton has a prominent nucleus and cytoplasm. Cell organelles like golgi bodies, mitochondria, etc are also present in the cytoplasm. From the cell body extend out two kinds of cytoplasmic extensions called dentrites and axons. The axon is covered by a fatty myelin sheath. Myelin sheath is discontinuous and broken at intervals by nodes of Ranvier. Axons usually a long, unbranched, cylindrical process that ends in many terminal end fibres. The axon ending of one nerve cell is lossely placed on the cell body of another nerve cell. The other small branch given out by the cyton are called dendrons which branch further into numerous thin hair-like dentrites.Need a full question paper?
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