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Inner ear, structure of cochlea - Neural control Cordination, Biology, Class 11 Video Lecture

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FAQs on Inner ear, structure of cochlea - Neural control Cordination, Biology, Class 11 Video Lecture

1. What is the structure of the cochlea?
Ans. The cochlea is a spiral-shaped, fluid-filled structure located in the inner ear. It is divided into three fluid-filled compartments called the scala vestibuli, scala media, and scala tympani. The scala media contains the organ of Corti, which is responsible for converting sound waves into electrical signals that can be interpreted by the brain.
2. How does the inner ear contribute to neural control and coordination?
Ans. The inner ear plays a crucial role in neural control and coordination. It is responsible for detecting sound waves and converting them into electrical signals that can be processed by the brain. The cochlea, in particular, is involved in the auditory pathway, where it transmits the electrical signals to the brain via the auditory nerve. This allows us to perceive and interpret sounds, helping us coordinate our movements and respond to auditory stimuli.
3. What is the function of the organ of Corti in the cochlea?
Ans. The organ of Corti is a specialized structure located in the scala media of the cochlea. It contains tiny hair cells that are responsible for converting sound waves into electrical signals. When sound vibrations enter the cochlea, they cause the hair cells to bend, which triggers the release of neurotransmitters. These neurotransmitters then stimulate the auditory nerve fibers, sending electrical signals to the brain for interpretation.
4. How does the structure of the cochlea contribute to our ability to hear different frequencies?
Ans. The structure of the cochlea is specifically designed to process different frequencies of sound. The cochlea is coiled in such a way that high-frequency sounds are detected near the base, while low-frequency sounds are detected near the apex. Additionally, the basilar membrane within the cochlea varies in stiffness along its length. This stiffness gradient allows different frequencies of sound to cause maximum displacement of the hair cells at specific locations along the basilar membrane, enabling us to perceive different frequencies of sound.
5. What happens if there is damage to the cochlea?
Ans. Damage to the cochlea can result in hearing loss or impairment. This can occur due to various factors, such as aging, exposure to loud noise, infections, or genetic conditions. When the cochlea is damaged, the hair cells may be unable to properly convert sound waves into electrical signals, leading to a decreased ability to hear or understand sounds. In severe cases, a cochlear implant may be considered as a treatment option to bypass the damaged cochlea and directly stimulate the auditory nerve.
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