Anatomy: The Cochlea

Questions and Answers

What is the primary composition of perilymph in the cochlea?

Similar to plasma (correct)

Similar to intracellular fluid

High in sodium

High in potassium

Which statement regarding endolymph in the cochlear duct is correct?

It has a high concentration of potassium. (correct)

It is secreted by vascular tissues.

It is similar to plasma in composition.

It has a high concentration of sodium.

How does the concentration of sodium in intracellular fluid compare to that in endolymph?

Endolymph has no sodium present.

Both have identical sodium concentrations.

Intracellular fluid has a higher concentration of sodium than endolymph. (correct)

Endolymph has a higher concentration of sodium than intracellular fluid.

Which of the following accurately describes a characteristic of endolymph?

It has a high concentration of potassium and is secreted by epithelial cells. Signup and view all the answers

What distinguishes the ionic composition of endolymph from that of perilymph?

Endolymph has high potassium, while perilymph is similar to plasma. Signup and view all the answers

What is similar to plasma in the cochlea?

Perilymph Signup and view all the answers

Endolymph has a high concentration of sodium ions (Na+).

False Signup and view all the answers

What type of fluid is endolymph in terms of its composition?

Similar to intracellular fluid Signup and view all the answers

The fluid found in the vestibular and tympanic duct is called __________.

perilymph Signup and view all the answers

Match the following fluids with their characteristics:

Perilymph = Similar to plasma Endolymph = High [K+] Intracellular fluid = Low [Na+] Extracellular fluid = High [Na+] Signup and view all the answers

Study Notes

Cochlea Anatomy Overview

The cochlea contains two types of fluids: perilymph and endolymph.

Perilymph

Found in the vestibular and tympanic ducts.
Composition is similar to plasma.

Endolymph

Located in the cochlear duct.
Secreted by epithelial cells that line the cochlear duct.
Has a composition similar to intracellular fluid.
Exhibits a high concentration of potassium ions ([K+]).

Fluid Composition Comparison

Endolymph is characterized by high [K+], contrasting with higher sodium ([Na+]) concentrations found in intracellular and extracellular fluids.

Cochlea Anatomy Overview

The cochlea contains two types of fluids: perilymph and endolymph.

Perilymph

Found in the vestibular and tympanic ducts.
Composition is similar to plasma.

Endolymph

Located in the cochlear duct.
Secreted by epithelial cells that line the cochlear duct.
Has a composition similar to intracellular fluid.
Exhibits a high concentration of potassium ions ([K+]).

Fluid Composition Comparison

Endolymph is characterized by high [K+], contrasting with higher sodium ([Na+]) concentrations found in intracellular and extracellular fluids.

Description

This quiz focuses on the anatomy of the cochlea, examining the unique properties and compositions of its fluids, including perilymph and endolymph. Understand the roles these fluids play in hearing and their ionic concentrations. Perfect for students studying human anatomy or physiology.