Intermediate Cochlea Quiz

Q1. Which membrane separates the scala vestibuli from the scala media?

• Vestibular membrane
• Secondary tympanic membrane
• Basilar membrane
• Tympanic membrane

Q2. Which structure forms the lateral wall of the cochlear duct and is important for generating the endocochlear potential?

• Spiral limbus
• Tectorial membrane
• Stria vascularis
• Osseous spiral lamina

Q3. Where are the cell bodies of primary auditory sensory neurons located?

• Geniculate ganglion
• Superior cervical ganglion
• Trigeminal ganglion
• Spiral ganglion

Q4. Which bony shelf projects from the modiolus and contributes to support of the cochlear partition?

• Spiral ligament
• Facial canal
• Osseous spiral lamina
• Arcuate eminence

Q5. Which membrane overlies the hair cells of the organ of Corti?

• Round window membrane
• Tectorial membrane
• Vestibular membrane
• Tympanic membrane

Q6. Which hair cells provide most afferent auditory input to the cochlear nerve?

• Outer hair cells
• Vestibular dark cells
• Supporting cells only
• Inner hair cells

Q7. What is a major function of outer hair cells?

• Mechanical amplification and sharpening of cochlear responses
• Generation of middle ear pressure
• Production of cerumen
• Conduction of sound through the ossicles

Q8. Which cochlear region is most responsive to high-frequency sounds?

• Apex of the cochlea
• Helicotrema only
• Base of the cochlea
• Vestibule

Q9. Which cochlear region is most responsive to low-frequency sounds?

• Base of the cochlea
• Internal acoustic meatus
• Apex of the cochlea
• Oval window only

Q10. Through which opening does pressure in the scala tympani reach the middle ear boundary?

• Pharyngotympanic tube
• External acoustic meatus
• Oval window
• Round window