1. Taste receptors are called
taste buds.
gustatory receptors.
olfactory receptors.
taste pores.

2. The muscle responsible for the change of the shape of the lens is the
arrector pili muscle.
orbicularis oculi. 
ciliary muscle.
superior rectus muscle.

3. The layer that contains photoreceptors is the
iris.
retina.
sclera.
cornea.

4. The area containing the highest concentration of cones is the
fovea centralis.
optic disc.
macula lutea.
iris.

5. The clear jellylike substance behind the lens of the eye is the
aqueous humor.
cellular body.
ciliary body.
vitreous humor.

6. The bending of light that happens at the cornea and lens is
accommodation.
reflection.
contraction.
refraction.

7. Which of the following belongs to the middle ear?
cochlea
ossicles
ampullae
vestibule

8. The receptors for hearing are located in the
semicircular canals.
cochlea.
sacculae.
vestibule.

9. The senses for dynamic equilibrium are located in the
utricle.
Organ of Corti.
cochlea.
semicircular canals.

10. The most common cause of blindness in the United States is
vertigo.
cataracts.
glaucoma.
macular degeneration.