Which type of neurone has the longest axon in the human body?

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Question

Which type of neurone has the longest axon in the human body?

Accepted Answer

motor neurone from spinal cord to toe muscle — Award 1 mark for recognizing that motor neurones can extend over 1 meter from the spinal cord to muscles in the feet, making them the longest cells in the body. A is incorrect — sensory neurones from toes are long but typically shorter than the corresponding motor neurones. C is incorrect — relay neurones are very short, contained within the CNS. D is incorrect — this pathway involves multiple neurones, not a single long axon.

Answer

sensory neurone from toe to spinal cord

Answer

relay neurone in the spinal cord

Answer

sensory neurone from finger to brain

Answer

motor neurone from spinal cord to toe muscle

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