Select the correct sensory pathway in a reflex arc.
A) Sensory neuron; spinal cord; interneuron; motor neuron; muscle
B) Sensory neuron; interneuron; motor neuron; muscle; spinal cord
C) Interneuron; motor neuron; muscle; sensory neuron; spinal cord
D) Interneuron; motor neuron; sensory neuron; spinal cord; muscle
E) Interneuron; motor neuron; spinal cord; muscle; sensory neuron

Question

Quizplus · Accepted Answer

In a reflex arc, the sensory neuron first detects the stimulus and sends the signal to the spinal cord where it synapses with an interneuron. The interneuron then sends the signal to the motor neuron which then stimulates the muscle to respond. Therefore, the correct pathway is sensory neuron; spinal cord; interneuron; motor neuron; muscle. Choice A is the only option that correctly follows this sequence.

Select the Correct Sensory Pathway in a Reflex Arc