How the ear hears flashcards

What part of the ear collects sound waves?

The outer ear, specifically the pinna, collects sound waves and directs them into the ear canal.

Define cochlea.

The cochlea is a spiral-shaped organ in the inner ear that converts sound vibrations into nerve signals.

True or false: The eardrum vibrates in response to sound.

True, because sound waves cause the eardrum to vibrate, transmitting the sound to the ossicles.

Difference between sound waves and vibrations.

Sound waves are longitudinal pressure waves in the air, while vibrations refer to the oscillation of particles or objects.

Fill in the blank: The three small bones in the middle ear are called the ___.

ossicles (malleus, incus, stapes). They amplify sound vibrations.

What role do hair cells play in hearing?

Hair cells in the cochlea convert mechanical sound vibrations into electrical signals for the brain.

What is the function of the auditory nerve?

The auditory nerve transmits sound information from the cochlea to the brain, allowing us to perceive sound.

True or false: The inner ear is responsible for balance.

True, because the vestibular system in the inner ear helps maintain balance and spatial orientation.

Identify the main parts of the ear.

Outer ear, middle ear, inner ear; each part has a unique role in hearing.

How does sound intensity affect hearing?

Louder sounds increase the amplitude of sound waves, leading to stronger vibrations and higher nerve signal rates.

What is the role of the ear canal?

The ear canal channels sound waves to the eardrum and protects the inner structures from debris.

List the parts of the middle ear.

Eardrum, ossicles (malleus, incus, stapes), and the Eustachian tube.

Noise-induced hearing loss is caused by ___

prolonged exposure to loud sounds, damaging hair cells in the cochlea.

What structure equalizes pressure in the ear?

The Eustachian tube connects the middle ear to the throat, helping equalize pressure.