Question

part a assessments
complete the following statements:

1. the organs of static equilibrium are located within two expanded chambers within the vestibule called the

and the saccule.

1. all of the balance organs are located within the

bone of the skull.

1. the receptor cells of these organs are found in the wall of the membranous labyrinth in a structure called the

.

1. otoliths are small grains composed of

.

1. sensory impulses travel from the organs of equilibrium to the brain on the

nerve.

1. the sensory organ of a semicircular duct lies within a swelling of the duct called the

.

1. the sensory organ within the ampulla of a semicircular duct is called a(an)

.

1. the

of this sensory organ consists of a dome - shaped, gelatinous mass.

1. when the head is moved, the fluid inside the membranous portion of a semicircular duct tends to remain stationary

because of the
of the fluid.

1. parts of the

of the brain interpret impulses from the equilibrium receptors.

Explanation:

1. The vestibule of the inner ear has two chambers for static equilibrium: utricle and saccule.
2. All inner ear balance organs are housed in the temporal bone of the skull.
3. The receptor cells for equilibrium are in the macula, part of the membranous labyrinth wall.
4. Otoliths are tiny grains made of calcium carbonate.
5. Equilibrium sensory signals travel to the brain via the vestibular nerve.
6. The sensory structure of the semicircular duct is contained within the ampulla, a swelling of the duct.
7. The sensory organ inside the semicircular duct's ampulla is the crista ampullaris.
8. The crista ampullaris has a dome-shaped gelatinous mass called the cupula.
9. When the head moves, fluid in the semicircular duct stays still due to its inertia.
10. The cerebellum (along with brainstem regions) processes equilibrium receptor impulses.

Answer:

1. utricle
2. temporal
3. macula
4. calcium carbonate
5. vestibular
6. ampulla
7. crista ampullaris
8. cupula
9. inertia
10. cerebellum