What neurons located in the sinus cavities are responsible for detecting odors?

The neurons responsible for detecting odors in the sinus cavities are olfactory receptors. These specialized sensory neurons are located in the olfactory epithelium, a small patch of tissue inside the nasal cavity. When odor molecules are inhaled, they dissolve in the mucus that coats the olfactory epithelium and bind to olfactory receptors, initiating the process of smell. This binding activates the neurons and sends signals to the brain, allowing the perception of different odors.

Olfactory receptors are unique in their ability to recognize a wide range of odorants and are essential for the sense of smell. This is in contrast to the other types of receptors listed, which have different functions: photoreceptors detect light, thermoreceptors sense temperature changes, and mechanoreceptors respond to mechanical forces such as pressure or touch. Each type of receptor has a specific role, highlighting the specialization in sensory systems.