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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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Evan1212 Evan1212
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6 years ago
A nurse is teaching a patient about vision. In which order will the nurse describe the pathway for vision, beginning with the first structure?
 
  1. Lens
  2. Pupil
  3. Retina
  4. Cornea
  5. Optic nerve
  a. 2, 1, 4, 5, 3
  b. 1, 2, 4, 3, 5
  c. 4, 2, 1, 3, 5
  d. 5, 2, 4, 1, 3
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#1
6 years ago
ANS: C
Light rays enter the convex cornea and begin to converge. An adjustment of light rays occurs as they pass through the pupil and lens. Change in the shape of the lens focuses light on the retina. The sensory retina contains the rods and cones (i.e., photoreceptor cells sensitive to stimulation from light). Photoreceptor cells send electrical potentials by way of the optic nerve to the brain.
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