It is generally agreed that there are four primary odors: sweet,bitter,sour and salty that are detected by olfactory receptors uniquely responsive to their specific chemical structure.

Question

Quizplus · Accepted Answer

It is not generally agreed that there are only four primary odors. Some researchers propose a larger number, while others suggest that there are no true primary odors and that all perceived odors are a combination of different scent molecules.

It Is Generally Agreed That There Are Four Primary Odors