The reception of a sound creates an impulse that is carried to the CNS. Which of the following is responsible for the transmission of this impulse?

A) A sensory neuron

B) A spinal nerve

C) A motor neuron

The correct answer is A, a sensory neuron. The reception of a sound wave stimulates nerves in the ear canal. This creates an action potential in the neuron, and sends the impulse to the Central Nervous System, which is why it is the sensory neuron that is primary transmittor.