The Fluid in the Scala Media Is

Question

The fluid in the scala media is
A) Endolymph, high in Na and low in K
B) Perilymph, high in Na and low in K
C) Endolymph, low in Na and high in K
D) Perilymph, low in Na and high in K
E) Plasma, high in Na and low in K

Accepted Answer

The fluid in the scala media, also known as the cochlear duct, is endolymph. Endolymph is unique in its composition compared to other body fluids because it is low in sodium (Na) and high in potassium (K), which is essential for the function of the hair cells in the inner ear.