Question

X, Y, Z are different parts of a neuron. X contains nucleus, surrounded by cytoplasm. It has all the cell organelles. Y conducts nerve impulse to X. Z is a long process from X and conducts nerve impulse away from X. Identify X, Y and Z.

• A. X- Cell body, Y- Axon, Z- Nissl's granules
• B. Y- Cell body, X- Dendrites, Z- Axon
• C. Z- Cell body, Y- Axon, X- Nissl's granules
• D. X- Cell body, Y- Dendrites, Z- Axon

Answer 1

The correct option is D X- Cell body, Y- Dendrites, Z- Axon

X is cell body, Y is dendrites and Z is axon.
The cell body or cyton of a neuron contains a well defined nucleus which is surrounded by cytoplasm. It contains all the cell organelles. Dendrites are short, branched cytoplasmic projections. They conduct the nerve impulse towards the cell body. Axon is a single and long process arising from the cell body. It conducts the nerve impulse away from the cell body.