Which event is not one of the steps that make up a reflex action,such as the knee-jerk reflex?
A) Stimulus is received by sensory neuron.
B) Sensory neuron sends action potential to brain.
C) Action potential travels to spinal cord.
D) Interneuron processes action potential.
E) Motor neuron sends response to muscle.

Question

Quizplus · Accepted Answer

In a reflex action, the sensory neuron receives the stimulus and sends the action potential directly to the spinal cord. The interneuron in the spinal cord processes the action potential and sends a response directly to the motor neuron, which then sends the response to the muscle, causing it to contract. The brain is not involved in the reflex arc and therefore does not receive the action potential from the sensory neuron.

Which Event Is Not One of the Steps That Make