The Nervous System & Reflex Arc

StageReceptor

Reaction time40 ms

Select Reflex and step to the Receptor — the very first stage of any pathway
On the Reflex pathway, step to the Relay neuron — this is what bypasses the brain
Select Voluntary and step to the Brain — the stage that replaces the relay neuron here
On either pathway, step all the way to the Effector — the final stage that produces the response
Compare the two: select Reflex and confirm its reaction time is faster than Voluntary