The Simplest Version of a Withdrawal from Pain Reflex Is

Multiple Choice

The simplest version of a withdrawal from pain reflex is a

A) pain receptor that synapses onto an interneuron, which in turn activates a motor neuron in the spinal cord.
B) pain receptor that projects to the thalamus, which then projects to motor cortex and then back down to the spinal cord.
C) motor neuron within the spinal cord that is spontaneously active.
D) sensory neuron in the visual cortex that synapses onto a motor neuron in the spinal cord.
E) motor neuron that activates sensory fibers.