Hearing and Balance

Which of the following is a part of the middle ear:

• the cochlea

• the Eustachian tube

• the external auditory canal

• the bony labyrinth

The auricle is made of which of the following:

• cerumen secretions

• the pinna

• elastic fibrocartilage

• perilymph and endolymph

Which of the following statements is true regarding hearing?

• air waves cause vibrations in the tympanic membrane which moves the malleus, incus and stapes on a pivot which, in turn moves the fluid within the vestibule moving hair cells in the crista ampullaris

• air waves cause vibrations in the tympanic membrane which moves the malleus, incus and stapes on a pivot which, in turn moves the fluid within the cochlea moving hair cells in the organ of Corti

• air waves cause vibrations in the tympanic membrane which moves the malleus, incus and stapes on a pivot which, in turn moves the fluid within the cochlea moving hair cells in the maculae

• air waves cause vibrations in the tympanic membrane which moves the malleus, incus and stapes on a pivot which, in turn moves the fluid within the vestibule moving hair cells in the organ of Corti

Which of the following structures is common to each compartment of the bony labyrinth:

• hair cells

• Reissner’s membrane

• ossicles

• organ of Corti

When sound waves vibrate the tympanic membrane what structure of the ear is moved next:

• the vestibule

• the cochlea

• the semicircular canals

• the malleus

Ceruminous glands which are found in the lateral half of the external auditory canal produce which of the following?

• ear wax

• secretions keep the tympanic membrane moist

• vibrations that transfer to the tympanic membrane

• none of the above

Which of the following are false regarding the bony labyrinth:

• the cochlea is responsible for hearing

• the vestibule is responsible for static equilibrium

• the semicircular canals are responsible for dynamic equilibrium

• the cochlea contains a sensory organ known as the organ of Corti

• the vestibule contains a sensory organ known as a crista ampullaris

Where would you find an incus?

• the semicircular canals

• the inner ear

• the middle ear

• the vestibule

What is accurate referring to 10 of the picture?

• the perilymph ripples strike the organ of Corti

• the stapes connect here (at the oval window)

• dynamic equilibrium is sensed by the hair cells

• the cochlea opens up to expel cerumen (ear wax)

What structure are 5 and 6 pointing to?

• a semicircular canal

• the ampulla

• vestibule

• the cochlea