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Eye and Ear
Anatomy of the Eye and Ear
15
Anatomy
12th Grade
01/22/2009

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Cards

Term
Conjunctiva
Definition
-lines the inner surface of the eyelids
-Thin membrane
-Covers the visible portion of the white of the eye
-Cells produce mucus
-With age, it often thins and dries, resulting in inflammation and enlarged blood vessels.
Term
Chemoreceptors
Definition
-Receptors for taste and smell
-detects chemicals in solution
Term
Photoreceptors
Definition
-Located in retina of the eye
-responds to light
Term
Thermoreceptors
Definition
-Detects changes in temperature
-Many located in the skin
Term
Thermoreceptors
Definition
-Detects changes in temperature
-Many located in the skin
Term
Mechanoreceptors
Definition
-Responds to movement: Stretch, pressure, or vibration.
-Monitors body position and hearing (equilibrium) activated by movement of cilia
Term
Threshold stimulus
Definition
An adequate stimulus that can generate a nerve impulse.
Term
Special senses
Definition
-Vision
-Hearing
-Equilibrium
-Taste
-Smell
Term
General Senses
Definition
-Pressure, Temperature, pain, and touch
-Position
Term
Sclera
Definition
-Outermost tunic, or coating.
-Made of tough connective tissue
-"white of the eye" (collagen)
-No blood vessels to add color.
Term
Choroid
Definition
-Second tunic of the eyeball
-Made of connective tissue w/many blood vessels
Term
Retina
Definition
-Innermost tunic
-Actual "Receptor" layer
-Contains the rods and cones (generates the nerve impulses associated w/vision).
Term
Choroid
Definition
-Second tunic of the eyeball
-Made of connective tissue w/many blood vessels
Term
Refraction
Definition
Bending of light rays as they pass from one substance to another substance.
Term
Order from exterior to interior of transparent refracting parts...
Definition
Cornea, Aqueous humor, lens, virteous body.
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