Term | Definition |
Sensory Receptor | this is the portion of your nervous system that actually detects a stimulus. |
Special Sense | this is localized in a special sense organ.
these are special senses such as vision, hearing and balance, and smell |
General Sense | these are widely distributed throughout the body. these are non-special senses like touch, heat, cold, pain, and body position |
Conjunctiva | this is a thin membrane that lines the inner surface of the eyelids and covers the visible portion of the white of the eye |
Lacrimal Glands | these produce tears that lubricate the eye and contain an enzyme (lysozyme) that protects against infection |
Sclera | The outermost tunic of the eye made of tough connective tissue |
Choroid | the second tunic of the eyeball that is composed of a delicate network of connective tissue interlaced with many blood vessels.
the “middle” layer of the eye between the sclera and the retina |
Retina | this is the eye’s actual receptor layer |
Refraction | this is the bending of light rays as they pass from one substance through another of a different density.
light will bend differently in air than it does in water |
aqueous humor | a watery fluid that fills much of the eyeball at the front of the lens.
this helps the cornea maintain the slight forward curve |
Vitreous Body | a soft, jelly-like substance that fills the entire space of the eye behind the lens |
Macula Lutea | this area may show degenerative changes with age |
Rhodopsin | a pigment within the rod of the eye |
Ophthalmologist | a physician who specializes in treatment of the eyes |
Optic Nerve | carries visual impulses from the retinal rods and cones up to the brain |
Middle Ear | a small, flattened space in the ear that contains three small bones |
Ossicles | these are the 3 small bones of the middle ear |