What is the best explanation for the dog's superior sense of smell compared to ours?
A)They have long snouts.
B)They are closer to the ground.
C)Their olfactory epithelium is much larger.
D)Their olfactory neurons project into their brain and ours don't.

Question

Quizplus · Accepted Answer

It is the receptors in the epithelium that respond to smell. The olfactory epithelium in humans is only about one inch square. Dogs have many more receptors on their correspondingly larger epithelium.

What Is the Best Explanation for the Dog's Superior Sense