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Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?

1. Vacuoles and fibres
2. Flagellum and medullary sheath
3. Nucleus and mitochondria
4. Perikaryon and dendrites

Correct answer: Perikaryon and dendrites

Solution

Perikaryon is the neuron’s cell body, and dendrites are the branched extensions that receive signals. These are distinctive features of nerve cells, unlike nucleus or mitochondria, which are found in many cell types.

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