Question

Which of the following membranes is Organ of Corti located on?
A) Basilar membrane
B) Basement membrane
C) Reissner membrane
D) Synovial membrane

Answer 1

Hint:The organ of Corti is a specialized sensory epithelium which is located in the inner ear. It rests on a secondary membrane inside the inner ear.

Complete answer:
1) The organ of Corti contains two types of hair cells which are inner hair cells and outer hair cells. Inner hair cells convert the sound from vibrations to neural signals. Outer hair cells improve frequency selectivity by attenuation of Organ of Corti. The fibrous tectorial membrane rests on top of the stereocilia or the outer hair cells.
2) The basilar membrane is a dense and thin membrane in the cochlea of the inner ear separating the scala media and the scala tympani, two tubes that run along the coil of the cochlea. The Organ of corti rests on this membrane.
3) The basement membrane is a thin, flat, sheet like type of extracellular matrix which provides cell and tissue support. The basement membrane is located in between epithelial tissues (mesothelium and endothelium) and the connective tissue located underneath. It acts as a platform for complex signalling to other layers of cells.
4) The Reissner's membrane is a membrane which separates scala media from scala vestibuli. It extends from the limbus to the stria vascularis at its upper extent. The sizeof this membrane is due to the relatively large number of cells in the lower layer, together with the increased surface area (microvilli).
5) The synovial membrane is the soft tissue found between the articular capsule (joint capsule) and the joint cavity of synovial joints.
Here we can see that the organ of Corti itself is located on the basilar membrane.

Thus, the correct answer is option A (Basilar Membrane).

Note:The primary function of the organ of Corti is the transduction of auditory signals.Cortisol has many functions in the human body, such as mediating the stress response, regulating metabolism, the inflammatory response, and immune function.