Ch 10
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24 terms
Spanish | English |
|---|---|
 General Sense Organs | often exist as individual cells or receptor units and widely distributed throughout the body; pain and touch |
| Special Sense Organs | large and complex and localized grouping of specialized receptors; eye, nose, ear, smell and taste buds |
| Chemoreceptors | chemical |
| Pupil, Cornea and Lens | 3 most important parts of the eye |
| Sclera | first layer of eyeball; tough outer coat; "white of eye" |
| Cornea | the transparent part of the sclera over iris; "window of eye" |
| Pupil | hole in iris is the... |
| Choroid | second layer of eyeball; pigmented vascular layer prevents scattering of light |
| Ciliary Muscle and Iris Muscle | front part of the choroid is made up of two muscles, what are they? |
| Conjunctiva | mucous membrane covering the front surface of the sclera and lining the eyelid |
| Conjunctivitis | inflammation of the conjunctiva and can interfere with refraction; infection also known as pink eye |
| Ciliary Muscle | attached to lens with ligament causing lens to change shapes |
| Iris Muscle | colored circular structure with spoked and circular fibers causing pupil to dilate or constrict; brown, blue colored part of eye |
| Eye Fluids | maintain normal shape of eye and help refract light rays |
| Aqueous Humor | in the anterior cavity in front of the lens (watery) |
| Aqueous Humor | constantly being formed, drained and replaced, if blocked pressure will increase causing glaucoma |
| Retina | has three kinds of cones sensitive to red, green or blue; allows us to distinguish colors |
| Astigmatism | defective curvature of cornea or lens of the eye; distortion caused by an irregularity of cornea or lens |
| Hyperopia | is often caused by a shortened eyeball; farsightedness |
| Myopia | is often caused by elongation of the eyeball; nearsightedness |
| Farsightedness | able to see far not near |
| Nearsightedness | able to see near not far |
| Glaucoma | excessive intraocular pressure that decreases blood flow in retina causing retinal degeneration; due to abnormal accumulation of aqueos humor in eye |
| Nyctalopia | night blindness or the inability to see in dim light is caused by retinal degeneration or lack of Vitamin A |
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