Anatomy II

Which of the following structures allows the pressure in the middle ear to equalize with the pressure in the outer ear?

• pharyngotympanic tube
• tympanic membrane
• round window

Standing still in an elevator that suddenly lowers stimulates receptors in the:

• bony labyrinth
• utricle and saccule
• basilar membrane

What is NOT part of the inner ear?

• tympanic membrane
• cochlea
• vestibule

What supports the spiral organ (organ of Corti)?

• tympanic membrane
• basilar membrane
• tectorial membrane

What part of the inner ear is involved in hearing?

• cochlea
• saccule
• utricle

Where does the conscious awareness of sound begin, along with the analysis of its pitch, location, and loudness?

• temporal lobe
• parietal lobe
• occipital lobe

The loud sound of a police siren will cause __________.

• weak vibrations of the endolymph and basilar membrane farther up the cochlea
• weak vibrations of the endolymph and basilar membrane at the base of the cochlea
• strong vibrations of the endolymph and basilar membrane at the base of the cochlea

When sound waves bend stereocilia, what happens?

• Hair cells hyperpolarize as potassium flows into the cell through open channels.
• Hair cells depolarize, releasing neurotransmitter, and triggering an action potential.
• The force of the sound waves is converted into mechanical energy.

Vibrations of the auditory ossicles are transmitted to the cochlea via the __________.

• oval window
• auricle
• round window

As sound waves travel into the ear, they pass from the auditory canal to the:

• tympanic membrane, auditory ossicles, oval window, endolymph, scala vestibuli of the cochlea.

• tympanic membrane, auditory ossicles, oval window, perilymph, scala vestibuli of the cochlea.

• tympanic membrane, auditory ossicles, oval window, perilymph, scala vestibuli of the cochlea.