Question

Endolymph has a good quantity of
a. $Na$
b. $Ca/K$
c. $Mg$
d. $Cl$

Answer 1

Perilymph is filled which is present inside the bony labyrinth. It is present outside the membranous labyrinth. The endolymph is filled present inside the membranous labyrinth. It is a fluid present in our ears. It fills up the ear which is unique to the other extracellular fluids present in our body. The endolymphatic sac is filled with endolymph.

Complete answer:
Endolymph is the fluid-filled in membranous labyrinth. It is present within the bony labyrinth mainly found in the inner ear. Endolymph has a good quantity of potassium and calcium concentration. It has an electric potential of about 80 - 90 mV. It also constitutes some amounts of calcium ions that are also present in endolymph. The vibrations which are generated in the cochlear duct cause the bending of sensory hair cells. It results in the generation of the electric impulse.

So, the correct answer is B '$Cl$
- $Na$has its concentration more in extracellular fluid. So, option A. $Na$is incorrect.
- $Mg$has its concentration in higher amounts in muscles, tissues etc. So, option B $Mg$is incorrect.
- $Cl$ is essential to the human body. They help in transmission of nerve impulse. So, option D $Cl$is incorrect

Hearing: The fluid waves in the endolymph of the cochlear duct stimulate the receptor cells. It then helps with their movement and changes into nerve impulses. This is then detected by the brain perceiving it as sound.

Balance: The angular acceleration of the endolymph in the semicircular canals facilitates the vestibular receptors of the endolymph. The semicircular canals act in concert to coordinate balance.

Hence, the correct answer is option (B).

Note: The perilymph of the cochlea is connected to the cerebrospinal fluid of the nervous system. There is a problem with chemical intervention to regenerate missing nerve cells to restore hearing. These fluids may migrate via perilymph and CSF into the central nervous system. The most promising research has been done by conversion into chemical restoration in small mammals. These are those mammals whose inner ear fluid is separate from the central nervous system. Even if we can repair damage in these animals, we would have to be able to prove it would not spread to the CNS in humans.