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Multiple Choice
Which structures are embedded into the otolithic membrane in the vestibular system?
A
Cochlear ducts
B
Otoliths
C
Hair cells
D
Semicircular canals
Verified step by step guidance
1
Begin by understanding the vestibular system, which is responsible for maintaining balance and spatial orientation. It includes structures such as the semicircular canals, otolithic organs, and the cochlea.
Focus on the otolithic organs, which consist of the utricle and saccule. These structures are involved in detecting linear acceleration and head position relative to gravity.
The otolithic membrane is a gelatinous layer within the otolithic organs. It plays a crucial role in the function of these organs by interacting with sensory hair cells.
Embedded within the otolithic membrane are small calcium carbonate crystals known as otoliths. These otoliths add weight to the membrane, enhancing its ability to detect changes in head position and movement.
Hair cells are sensory receptors located beneath the otolithic membrane. When the head moves, the otoliths shift, causing the membrane to move and bend the hair cells, which then send signals to the brain to interpret balance and spatial orientation.