1 Within the inner ear this structure is involved in dynamic

1. Within the inner ear, this structure is involved in dynamic equilibrium. A) cochlea B) the semicircular canals C) saccule D) utricle

2. The auditory ossicles transmit and amplify sound waves in the middle ear. In sequence, waves pass from: _ .

A) incus- malleus- stapes. B) malleus- stapes- incus. C) malleus- incus- stapes. D) incus- stapes- malleus.

Solution

B) the semicircular canals

Ear is a sensory organ that is concerned with the functions of hearing and equilibrium. Membranous labyrinth contains the receptors for equilibrium (vestibular apparatus) and hearing (cochlear duct).

“Vestibule” is the central part of the inner ear, and it lies between cochlea and semi-circular canals. It contains utricle and saccule which are parts of membranous labyrinth. Maculae in the vestibule contain sensory receptors called hair cells, which are essential to the mechanism of static equilibrium. Semi-circular canals are involved with the dynamic equilibrium.