Difference Between Endolymph and Perilymph

Endolymph refers to the fluid in the membranous labyrinth of the inner ear whereas perilymph refers to the fluid between the membranous labyrinth of the ear and the bone which encloses it.

1. What is the function of Endolymph and Perilymph?
2. Where do you find Perilymph and Endolymph?
3. What would be the effect of this mixing of Endolymph and Perilymph?
4. What is Endolymphatic system?
5. What is the purpose of Endolymph?
6. What causes Endolymph?
7. What fluid is in the cochlear duct?
8. Which cochlear chamber is the most superior?
9. Why is there fluid in the cochlea?
10. What is the organ of Corti?
11. Is Endolymph a hormone?
12. What nerve gathers nerve impulses from the cochlea?

What is the function of Endolymph and Perilymph?

Perilymph and endolymph have unique ionic compositions suited to their functions in regulating electrochemical impulses of hair cells necessary for hearing.

Where do you find Perilymph and Endolymph?

The membranous labyrinth is contained within the bony labyrinth, and within the membranous labyrinth is a fluid called endolymph. Between the outer wall of the membranous labyrinth and the wall of the bony labyrinth is the location of perilymph.

What would be the effect of this mixing of Endolymph and Perilymph?

The effect of mixing of endolymph and perilymph will increase the potassium levels and this would cause the increase of membrane depolarization, hence, the amount of calcium that enters the hair cells would also increase.

What is Endolymphatic system?

Endolymphatic system. The endolymphatic sac (ES) is a membranous structure in the inner ear located partly in the temporal bone and partly within the dura of the posterior fossa. It contains endolymph, which is similar in chemical makeup to intracellular fluid (high in K, low in Na).

What is the purpose of Endolymph?

The inner ear has two main sections, the bony labyrinth and the membranous labyrinth. Endolymph is located in the membranous labyrinth of the inner ear. This fluid bathes the sensory cells of the inner ear and allows them to function normally.

What causes Endolymph?

Endolymph is created from perilymph. The endocochlear potential is the sum of two potentials: a positive potential caused by active secretion of K+ by the stria vascularis (120mV) and a negative potential created by the passive diffusion of K+ ions from the hair cells (40mV), which can be visualised after an anoxia.

What fluid is in the cochlear duct?

Scala media contains endolymph, a specialized fluid with a low concentration of Na+ and a high concentration of K+ (about 160 mM).

Which cochlear chamber is the most superior?

The cochlea is a spiralled, hollow, conical chamber of bone. Its structures include: the scala vestibuli (containing perilymph), which lies superior to the cochlear duct and abuts the oval window.

Why is there fluid in the cochlea?

The cochlea is filled with a watery liquid, the endolymph, which moves in response to the vibrations coming from the middle ear via the oval window.

What is the organ of Corti?

The Organ of Corti is an organ of the inner ear located within the cochlea which contributes to audition. The Organ of Corti includes three rows of outer hair cells and one row of inner hair cells. Vibrations caused by sound waves bend the stereocilia on these hair cells via an electromechanical force.

Is Endolymph a hormone?

These results suggest that the cellular transport systems involved in the endolymph secretion may be altered by different hormones such as antidiuretic hormone and/or adrenocorticosteroid hormones. Nevertheless, the hormonal modulation of the inner ear fluid homeostasis remains to be further documented.

What nerve gathers nerve impulses from the cochlea?

The Inner Ear

The snail-shaped cochlea changes the vibrations from the middle ear into nerve signals. These signals travel to the brain along the cochlear nerve, also known as the auditory nerve. The semicircular canals look like three tiny, connected tubes.