Information Flow/Connections In The Retina

30 Questions | Total Attempts: 52

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Eye Quizzes & Trivia

Neurophys final pg. 150-155, 162-164


Questions and Answers
  • 1. 
    What is the purpose of having several different rod pathways?
    • A. 

      More rods so need more pathways

    • B. 

      Allow greater response over greater range of light levels

    • C. 

      Able to differentiate between different wavelengths better

  • 2. 
    In the rod pathways, the rod A2 amacrine cell is involved in connections between:
    • A. 

      Rod ON BP and cone ON BP

    • B. 

      Rod BP and OFF GC

    • C. 

      Rod OFF BP and cone OFF BP

    • D. 

      A and b

    • E. 

      B and c

  • 3. 
    Where are BP cells found?
    • A. 

      ONL

    • B. 

      ELM

    • C. 

      INL

  • 4. 
    The OPL is divided into 2 sublamina A and B
    • A. 

      True

    • B. 

      False

  • 5. 
    Sublamina A of the IPL is more ______ or closer to the ___ cells
    • A. 

      Distal; GC

    • B. 

      Distal; BP

    • C. 

      Proximal; GC

    • D. 

      Proximal; BP

  • 6. 
    Sublamina A is associated with the ON pathway
    • A. 

      True

    • B. 

      False

  • 7. 
    A biplexiform cell is a bipolar cell that receives info directly from the photoreceptors.
    • A. 

      True

    • B. 

      False

  • 8. 
    Biplexiform cells receive mostly rod input and their function is unknown.
    • A. 

      True

    • B. 

      False

  • 9. 
    How much of the brain is used to process visual information?
    • A. 

      20%

    • B. 

      50%

    • C. 

      60%

  • 10. 
    How many types of horizontal cells are there in primate retina?
    • A. 

      1

    • B. 

      2

    • C. 

      3

  • 11. 
    H1 cells ______ info and H2 cells ______ info
    • A. 

      Concentrate; multiply

    • B. 

      Multiply; concentrate

    • C. 

      Multiply; multiply

  • 12. 
    Horizontal cells have cell bodies in the _____ and synapses in the _____.
    • A. 

      OPL; INL

    • B. 

      INL; IPL

    • C. 

      INL; OPL

  • 13. 
    Decribe how we know that horizontal cells are not involved with carrying color vision information.
  • 14. 
    How do Horizontal cells contribute to receptive fields?
    • A. 

      Produce the RF center of GCs

    • B. 

      Produce the RF surround of GCs

    • C. 

      Can produce both the RF center and surround

  • 15. 
    Amacrine cells have long axons which allows them to contact many different BPs
    • A. 

      True

    • B. 

      False

  • 16. 
    Midget GCs receive as much input from amacrine cells as they do from BPs
    • A. 

      True

    • B. 

      False

  • 17. 
    There are 25 different amacrine cells each with a known visual function
    • A. 

      True

    • B. 

      False

  • 18. 
    A2 cells mediate ___ vision and contain _____ as a neurotransmitter
    • A. 

      Rod; glycine

    • B. 

      Rod; glutamate

    • C. 

      Cone; glycine

    • D. 

      Cone; glutamate

  • 19. 
    Describe how amacrine cells are involved in GC's response to high temporal frequency changes in the environment
  • 20. 
    A smaller receptive field results in higher spatial resolution.
    • A. 

      True

    • B. 

      False

  • 21. 
    What cell is responsible for the feedback loop in the retina?
    • A. 

      Biplexiform cells

    • B. 

      Ganglion cells

    • C. 

      Interplexiform cells

  • 22. 
    Indicate what changes occur in the receptive field during dark adaptation.
    • A. 

      Reduced color vision

    • B. 

      More sensitive to low light levels

    • C. 

      Reduced VA

    • D. 

      RF center gets larger

  • 23. 
    What cell is thought to be involved in the changes that occur in the receptive field during dark adaptation.
    • A. 

      Biplexiform cells

    • B. 

      Ganglion cells

    • C. 

      Interplexiform cells

  • 24. 
    Describe the ON PATHWAY in terms of cells involved and cellular responses.
  • 25. 
    Describe the OFF PATHWAY.