Special Senses: Auditory

Front

What structures are included in the external ear?

Back

The external ear includes the pinna (auricle), external auditory canal, and tympanic membrane (eardrum). It does NOT include the malleus.

Front

What is the function of the cochlea?

Back

The cochlea is responsible for converting sound vibrations into neural signals for hearing.

Front

What fluid is found in the scala vestibule?

Back

The scala vestibule contains perilymph, not endolymph.

Front

What is the role of the round window in the ear?

Back

The round window equalizes pressure in the fluid-filled chambers of the cochlea.

Front

Which cranial nerve is responsible for hearing?

Back

Cranial Nerve VIII (Vestibulocochlear nerve) is responsible for hearing.

Front

Which cranial nerve is responsible for equilibrium?

Back

Cranial Nerve VIII (Vestibulocochlear nerve) is also responsible for equilibrium.

Front

What is the difference between endolymph and perilymph?

Back

Endolymph is the fluid found in the cochlear duct, while perilymph is found in the scala vestibule and scala tympani.

Front

What is the function of the tympanic membrane?

Back

The tympanic membrane (eardrum) vibrates in response to sound waves, transmitting sound to the ossicles.

Front

What are the three ossicles of the middle ear?

Back

The three ossicles are the malleus, incus, and stapes.

Front

How does sound travel through the ear?

Back

Sound travels through the external ear canal, vibrates the tympanic membrane, moves the ossicles, and then enters the cochlea.