Ch12T16.txt

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Author:
aphy101
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273125
Filename:
Ch12T16.txt
Updated:
2014-05-04 15:01:43
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profmwinston
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Ch 12 Topic 16
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  1. Contains 80% of focusing power; light first enters the eye through it.
    Cornea
  2. White portion of the eye continuous with the cornea; is an attachment for the extrinsic muscles of the eye, and protects the outer surface.
    Sclera
  3. Sends visual info in the form of neurons to the CNS.
    Optic Nerve
  4. The "blind spot" of the eye with no receptor cells; where neurons leave the eye to go to the CNS.
    Optic Disc
  5. Folds of epithelium covering the ciliary muscle.
    Ciliary Processes
  6. A smooth muscular ring that projects into the interior of the eye.
    Ciliary Muscle
  7. Contains photoreceptors, also contains pigment cells, supporting cells, and neurons; where light is gathered.
    Retina
  8. Supports the lens and controls its shape.
    Ciliary Body
  9. The amount of light entering the eye and the size of the pupil is controlled by this.
    Iris
  10. Is composed of specialized epithelial cells that focuses by changing shape; is held in position by the suspensory ligaments of the ciliary body.
    Lens
  11. For distant vision, when ciliary muscles relax, suspensory ligaments become tight and the lens becomes _____.
    Thinner
  12. For close vision, when ciliary muscles contract, suspensory ligaments become loose and the lens becomes _____.
    Thicker
  13. What are the 2 types of photoreceptors?
    • 1) Rods (detect black and white)
    • 2) Cones (detect color)
  14. This type of photoreceptor detects color, requires more light, for fine vision, contains the color-sensitive pigment iodopsin.
    Cones
  15. This type of photoreceptor detects black and white, requires less light, for course vision, contains the light-sensitive pigment, rhodopsin.
    Rods
  16. Color-sensitive pigment found in cones.
    Iodopsin
  17. Light-sensitive pigment found in rods.
    Rhodopsin
  18. Lies in the visual axis' pathway and contains the fovea centralis.
    Macula Lutae
  19. The point of sharpest vision located in the macula lutae.
    Fovea Centralis
  20. The bending of light; the greatest amount of it is required to view objects that are very close to the lens.
    Refraction
  21. The sharpest vision in the eye, or visual acuity, occurs at the fovea centralis, where there is a higher density of _____.
    Cones
  22. What are the 3 color pigments found in cones?
    • 1) Erythrolabe (sensitive to red)
    • 2) Chlorolabe (sensitive to green)
    • 3) Cyanoabe (sensitive to blue)
  23. This type of vision sees objects less than 20 ft. away, and the light waves run at an angle.
    Stereoscopic
  24. Stereoscopic vision requires 2 eyes, known as _____.
    Binocular Vision
  25. If an object is more than 20 ft. away, the light waves run _____.
    Parallel
  26. What is the carbonic acid disassociation formula?
    CO2 + H2O <> H2CO3 <> H+ + HCO3-
  27. What is Fick’s Law?
    (Rate of Diffusion) Dk x [(CG x SA x T) / (MW x MT)]

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