What is the functional unit of the nervous system?
Answer and explanation
Correct answer: B. Neuron
- Step 1: The nervous system is specialized for rapid electrical signal generation, transmission, and integration.
- Step 2: The neuron (nerve cell) is the fundamental structural and functional unit of neural tissue, composed of a soma, dendrites, and an axon.
Answer
Neuron.
Why not the others: 'Nephron' is the functional filtration and excretory unit of the mammalian kidney; 'Alveolus' is the primary functional site of gas exchange in the lungs; 'Osteocyte' is a mature bone cell embedded within lacunae.
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