BIO NMDCAT Receptors

nmdcat.online July 7, 2026

The detection of the position of the head relative to gravity relies on the displacement of calcium carbonate crystals called

A. Otoliths

✓

B. Stereocilia

C. Cupulae

D. Ampullae

📝 Explanation

Otoliths (or otoconia) are heavy calcium carbonate crystals in the maculae of the utricle and saccule. Gravity pulls on them, shifting the gelatinous membrane and bending the underlying hair cells.

📖 Additional Information

Otoliths
Stereocilia
Cupulae
Ampullae

Otoliths (or otoconia) are heavy calcium carbonate crystals in the maculae of the utricle and saccule. Gravity pulls on them, shifting the gelatinous membrane and bending the underlying hair cells.

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