Cochlear Function and Anatomy

The video tutorial explains the physiology of hearing, detailing the structure and function of the outer, middle, and inner ear. It highlights the role of the cochlea and hair cells in converting sound waves into electrical signals, which are then transmitted to the brain. The tutorial also covers the basilar membrane's role in frequency analysis and the importance of the spiral ganglion in auditory signal transmission.

Which part of the ear is involved in both hearing and balance?

• Eardrum

• Inner ear

• Middle ear

• External ear

What is the main function of the cochlea?

• To collect sound waves

• To maintain balance

• To amplify sound waves

• To convert sound waves into neural signals

What is the role of the basilar membrane in the cochlea?

• To produce endolymph

• To separate the middle and inner ear

• To transmit signals to the brain

• To vibrate in response to sound waves

What triggers the release of neurotransmitter glutamate in the cochlea?

• Movement of the stapes

• Contraction of outer hair cells

• Bending of hair cells

• Vibration of the eardrum

What is the primary role of inner hair cells in the organ of Corti?

• To amplify sound signals

• To transmit sensory input to auditory nerve fibers

• To produce endolymph

• To maintain balance

What percentage of sensory neurons innervate the inner hair cells?

• 95%

• 50%

• 5%

• 10%

What is the function of the spiral ganglion?

• To amplify sound waves

• To transmit electrical signals to the brain

• To produce neurotransmitters

• To maintain equilibrium

Where do the spiral ganglion neurons transmit sensory information?

• To the eardrum

• To the middle ear

• To the cochlea

• To the brain

What does the basilar membrane's stiffness variation allow?

• Sound wave collection

• Frequency analysis

• Balance maintenance

• Neural signal transmission

According to the traveling wave theory, where do high-frequency sounds cause maximum displacement?

• In the external auditory canal

• Near the apex of the cochlea

• In the middle ear

• Near the base of the cochlea