jackien1
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#1
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#1
Which neurones are in the CNS and which are in the PNS?

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username1204031
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Is this an exam question? Because I'm fairly sure that the CNS is made up only of the spinal cord and the brain, and the PNS contains all motor/sensory/relay neurones.
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jackien1
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#3
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(Original post by JordanL_)
Is this an exam question? Because I'm fairly sure that the CNS is made up only of the spinal cord and the brain, and the PNS contains all motor/sensory/relay neurones.


Yes here is the question and its answer:
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username1204031
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#4
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Okay, so when you receive a stimulus, an impulse is carried down the sensory neurone(s) to the CNS. Here it's sent through the CNS. But also, in a reflex response, the impulse is carried straight to a motor neurone(s) to cause the response.

The relay neurone's job is to carry the impulse from the sensory neurone across to the motor neurone, and this only happens in the CNS. So the relay neurone only exists in the CNS.
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