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Mechanism of Hearing MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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Mechanism of Hearing
- How does ear converts sound waves into neural impulses, which are sensed and processed by the brain enabling us to recognise a sound?
- The external ear receives sound waves and directs them to the eardrum.
- The eardrum vibrates in response to sound waves and these vibrations are transmitted through the ear ossicles (malleus, incus and stapes) to the oval window.
- The vibrations are passed through the oval window into the fluid of the cochlea, where they generate waves in the lymph.
- The waves in the lymph induce a ripple in the basilar membrane. These movements of the basilar membrane bend the hair cells, pressing them against the tectorial membrane.
- As a result, nerve impulses are generated in the associated afferent neurons.
- These impulses are transmitted by the afferent fibres via auditory nerves to the auditory cortex of the brain, where the impulses are analysed and the sound is recognised.
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