ANA 111 - The Ear

Which part of the ear is responsible for hearing?

• Vestibule

• Semicircular canals

• Cochlea

• Eustachian tube

Which fluid fills the membranous labyrinth of the inner ear?

• Perilymph

• Endolymph

• Cerebrospinal fluid

• Plasma

What is the function of O:

• Amplify sound waves

• Detect rotational mevements

• Add weight to membrane for gravity detection

• Protect hair cells from damage

The sensory receptors in the semicircular canals are located in the:

• Maculae

• Cristae ampullares

• Organ of Corti

• Oval window

Which structure detects linear acceleration in the vertical plane?

• Utricle

• Saccule

• Semicircular canals

• Cochlea

After spinning in circles, a person feels dizzy because:

• The otoliths are still moving

• Endolymph in the semicircular canals continue to move

• Hair cells in the cochlea are overstimulated

• The eustachian tube is blocked

Which part of the ear would be responsible for detecting the sudden stop at the end of a roller coaster ride?

• Cochlea

• Semicircular canals

• Vestibule

• Tympanic membrane

Anna can hear sounds but struggles to understand speech, especially in noisy environments. This issue is likely due to problems with:

• Outer ear blockage

• Cochlear hair cells

• Auditory nerve processing

• He was ignoring the person for emotional security

Why might someone experience dizziness after a sudden change in altitude (e.g., flying or driving up a mountain)?

• Imbalance in endolymph production

• Pressure change affecting eustachian tube

• Othiliths shifting the cochlea

• Overstimlation of outer hair cells

What is the function of TM:

• Sensing head movements and balance

• Amplifying sound

• Converting sound into signals

• Equalizing ear pressure