Final answer:
Humans have about 350 olfactory receptor subtypes that work together to sense about 10,000 different odors, so there is not a distinct receptor for each detectable odor.
Step-by-step explanation:
Humans have about 350 olfactory receptor subtypes that work in various combinations to allow us to sense about 10,000 different odors. This means that there is not a distinct receptor for each detectable odor, but rather a combination of receptors that work together to detect different odors. For example, mice have about 1,300 olfactory receptor types, which may allow them to sense more odors than humans.
Both odors and tastes involve molecules that stimulate specific chemoreceptors. While humans commonly distinguish taste as one sense and smell as another, they work together to create the perception of flavor. A person's perception of flavor is reduced if they have congested nasal passages.