In which of the following neurons length of dendrite is greater than axon_______________?
Correct answer: A. Sensory neuron
- A. Sensory neuron
- B. Motor neuron
- C. Associative neuron
- D. none of these.
Explanation
In the school-level classification used here, a sensory neuron's dendron is longer than its axon because the receptor may be far from the cell body, while the axon carries the impulse onward to the CNS. The common error is choosing a motor neuron by assuming its longest process must be a dendrite, although its long process is usually the axon.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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