Railway Science (Biology – Sensory Organs)

Cochlea : It is a fluid-filled, spiral-shaped cavity found in the inner ear. It plays a vital role in the sense of hearing and participates in the process of auditory transduction. The middle ear contains three tiny bones : Hammer (malleus) - attached to the eardrum. Anvil (incus) - in the middle of the chain of bones. Stirrup (stapes) - attached to the membrane.

Gustatory receptors - Sense flavors on the tongue. Taste receptors recognize five basic tastes (Salty, sour with the help of ion channels and Sweet, bitter and umami with the help of G protein-coupled taste receptors).
Olfactory receptors (smell receptors) are protein receptor molecules that bind to odor molecules and detect the smell. Sensory receptors occur in specialized organs such as the eyes, ears, nose, and mouth, as well as internal organs.