In a reflex arc, the correct sequence of cell types through which an electrical signal would pass would be
A. motor neuron ? sensory neuron ? interneuron in the PNS
B. sensory neuron ? motor neuron ? interneuron in the CNS
C. sensory neuron ? interneuron in the CNS ? motor neuron
D. motor neuron ? interneuron in the PNS ? sensory neuron
Answer: C
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