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  4. Which of the following is regarded as a unit of nervous tissue?

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Q. Which of the following is regarded as a unit of nervous tissue?

AIPMTAIPMT 1999Neural Control and Coordination

Solution:

Neurons or nerve cells are the structural and functional unit of nervous system. These have a special structure but vary greatly in size and shape. Each neuron has a cell body which encloses cytoplasm and has a nucleus. A number of processes arise from the cell body. There is usually a single axon and a variable number of dendrites. The medullated nerve fibres is composed of a shining, white, fatty substance called myelin.