AP PSYCHOLOGY

Detailed explanation-1: -Substances that smell give off tiny molecules. Inhaling moves these molecules into your nose. There, special cells (olfactory receptors) detect these molecules. The receptors relay this information to your brain through your olfactory nerve and allow you to perceive smell.

Detailed explanation-2: -Odorants are first detected in the upper region of the nose by the main olfactory epithelium (OE). In this region, millions of olfactory sensory neurons (OSNs) interact with odor molecules through the odorant receptors (ORs), which belong to the superfamily of G protein-coupled receptors.

Detailed explanation-3: -olfactory receptor, also called smell receptor, protein capable of binding odour molecules that plays a central role in the sense of smell (olfaction).

Detailed explanation-4: -Smell. Olfactory receptor neurons (ORNs) are bipolar neurons that are activated when airborne molecules in inspired air bind to olfactory receptors (ORs) expressed on their cilia. The ORs belong to a G-protein-coupled receptor superfamily. The ORNs are located high within the nasal vault in the olfactory epithelium.

Detailed explanation-5: -Olfactory receptors are protein receptor molecules that bind to odor molecules and detect the smell. They are G protein-coupled receptors (GPCR) present in olfactory receptor neurons. The olfactory receptors are accumulated at the back of the nasal cavity, giving rise to the olfactory epithelium.