Fill in the blank with the best possible answer.

1		A receptor that senses movement is a(n) .
2		Receptors that respond to light are called .
3		Receptors in blood vessels that respond to changes in stretch of the vessel wall are called .
4		A receptor in the hypothalamus that monitors blood oxygen levels would be considered a(n) .
5		The auricle is part of the ear.
6		Excessive heat activates .
7		The malleus, , and stapes are the auditory ossicles.
8		Changing of the shape of the lens is called .
9		The portion of the eye that gives its "color" is the .
10		An enlargement of the semicircular canal is called the .
11		The stretch receptors in muscle bellies are called muscle .
12		The white of the eye is the .
13		The adjustable part of the eye through which light passes and enters the posterior chamber is the .
14		The cavity is filled with aqueous humor.
15		The major function of the cornea and lens is to light.