Question

which of the following statements regarding the inner ear is not true?
a the fluid - filled cavity of the inner ear is called the labyrinth.
b the hearing and equilibrium sensory organs are in the labyrinth.
c the semicircular canals are the sensory organs for hearing.
d the sensory organs in the inner ear contain hair cells.

Explanation:

• The inner ear has a fluid - filled cavity called the labyrinth (A is true).
• The hearing (cochlea) and equilibrium (semicircular canals, utricle, saccule) sensory organs are in the labyrinth (B is true).
• The cochlea is the sensory organ for hearing, while the semicircular canals are for equilibrium (C is false).
• The sensory organs (cochlea for hearing and structures for equilibrium) in the inner ear contain hair cells which are mechanoreceptors (D is true).

Answer:

C. The semicircular canals are the sensory organs for hearing.