Question

this gelatinous, ampullary structure is in the semicircular canals of the vestibular system and is involved with rotation:
perilymph
spiral organ
endolymph
ampullary cupula

Explanation:

To solve this, we analyze each option:

• Perilymph: Fluid in the inner ear, not the gelatinous ampullary structure in semicircular canals related to rotation.
• Spiral organ: Involved in hearing (transducing sound), not rotation in the vestibular system.
• Endolymph: Fluid in the membranous labyrinth, not the gelatinous ampullary structure for rotation.
• Ampullary cupula: Gelatinous, ampullary structure in semicircular canals, detects rotational movements (part of vestibular system).

Answer:

D. ampullary cupula