What chemical are chemoreceptors sensitive to?

Chemoreceptors are sensory receptors that detect chemicals. They are located in the nose, mouth, throat, and gut, and they send signals to the brain about the presence of specific chemicals.

The chemicals that chemoreceptors are sensitive to include:

* Odors: Chemoreceptors in the nose are sensitive to a wide variety of odors. These odors are detected by olfactory receptors, which are located in the olfactory epithelium.

* Tastes: Chemoreceptors in the mouth are sensitive to five basic tastes: sweet, sour, salty, bitter, and umami. These tastes are detected by taste receptors, which are located on the tongue, epiglottis, and soft palate.

* Irritants: Chemoreceptors in the throat and gut are sensitive to irritants, such as smoke, dust, and chemicals. These irritants can trigger coughing, sneezing, and vomiting.

Chemoreceptors play an important role in our sense of smell, taste, and appetite. They also help to protect us from harmful substances.