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Home  >>  JEEMAIN and AIPMT  >>  Biology  >>  Human Physiology
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A neuron is a microscopic structure composed of three major parts - ____________ , __________ and ___________ . The cell body contains cytoplasm with typical cell organelles and certain called __________________ . The _______________ is a long fibre, the distal end of which is branched.( Identify the structure and fill in the blanks)

image
( a ) cell body (C), dendrites (A) and axon (E) ; Nissl’s granules (B) ; axon (E)
( b ) dendrites (C), cell body (A) and axon (E) ; Nissl’s granules (D) ; axon (E)
( c ) cell body (C), axon (A) and dendrites (E) ; polyribosomes (D) ; axon (E)
( d ) cell body (C), axon (A) and dendrites (E) ; ribosomes (B) ; dendrites (E)
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(A) is the right answer.

A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon (Figure 21.1). The cell body contains cytoplasm with typical cell organelles and certain granular bodies called Nissl’s granules. Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and are called dendrites. These fibres transmit impulses towards the cell body. The axon is a long fibre, the distal end of which is branched.
answered Mar 26, 2014 by pady_1
 

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