Which of the special senses contains receptor neurons that are the only nerve cells in direct contact with the outside environment?

Question

Quizplus · Accepted Answer

The sense of smell (olfaction) contains receptor neurons located in the nasal passage that are the only nerve cells in direct contact with the outside environment. When certain molecules in the air bind to these receptor neurons, they transmit signals to the brain, allowing us to perceive different scents. The other senses (equilibrium, hearing, taste, and vision) have receptor neurons located internally within the body.

Which of the Special Senses Contains Receptor Neurons That Are