The Sense of Smell Is

Multiple Choice

The sense of smell is

A) coded by genes with each of 500-1000 genes coding for a separate odor receptor.
B) poor in humans when compared to other mammals such as dogs.
C) detected with olfactory endings in a special epithelium covered by a thin film of mucus deep in the nasal cavity.
D) analyzed by olfactory cortex that is connected to centers of emotions.
E) All of the choices are correct.