The human ear is a complex sensory organ that detects sound waves and converts them into electrical signals the brain interprets as sound. The ear als
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What happens if the Eustachian tube becomes blocked?
If blocked, air pressure in the middle ear becomes lower than atmospheric pressure, causing the eardrum to be pulled inward. This reduces eardrum vibration and causes temporary conductive hearing loss. Fluid may accumulate, further reducing hearing. Common causes include upper respiratory infections, allergies, or rapid altitude changes.
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How do the semicircular canals provide balance information?
The three semicircular canals are oriented at right angles to detect rotation in all three planes. Inside each canal is fluid and hair cells. When you turn your head, the fluid lags behind, bending the hair cells. Hair cells send signals to the brain about head rotation and movement, allowing the brain to adjust eye position and body balance.
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Why can sudden loud noise cause permanent hearing loss?
Very loud noises (above 85-90 dB) can damage or destroy hair cells in the organ of Corti. Unlike most cells, hair cells in humans cannot regenerate. Permanent damage results in permanent hearing loss. Repeated exposure to loud noise causes cumulative damage, leading to noise-induced hearing loss.
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