Olfactory cells are normally stimulated by ________
A) movement of a cupula
B) stretching of stretch receptors
C) the movement of otoliths
D) airborne molecules
D
Explanation:
A) A cupula is found in the inner ear, not on the olfactory epithelium.
B) Stretch receptors are not found in the olfactory epithelium.
C) Otoliths are found in the ear, not on the olfactory epithelium.
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