Morphology Of The Opl And IPL (em)

17 Questions

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Morphology Quizzes & Trivia

P. 156-158


Questions and Answers
  • 1. 
    A cone pedicle has more invaginations than a rod spherule.
    • A. 

      True

    • B. 

      False

  • 2. 
    Describe the post synaptic cell arrangement in cone ribbon synapses.
  • 3. 
    In cones, the invaginating synapses are involved in the ___ pathway and the flat synapses are involved in the ___ pathway.
    • A. 

      Off; on

    • B. 

      On; off

  • 4. 
    Rods typically have more than 1 central process.
    • A. 

      True

    • B. 

      False

  • 5. 
    In cone ribbon synapses, the horizontal cells are NOT connected by gap junctions.
    • A. 

      True

    • B. 

      False

  • 6. 
    Gap junctions:
    • A. 

      Connect all photoreceptors to each other

    • B. 

      Electrically couple photoreceptors

    • C. 

      Are found between horizontal cells in rod ribbon synapses

    • D. 

      2 of the above

    • E. 

      All of the above

  • 7. 
    Adherent junctions are made of ___ gap junctions which are made of _______ (protein)
    • A. 

      1; connexins

    • B. 

      3; microtubules

    • C. 

      3; connexins

  • 8. 
    How many different BPs are there in primates?
    • A. 

      1

    • B. 

      5

    • C. 

      7

  • 9. 
    Diffuse BPs contact ____ cone(s) and midget BPs contact ____ cone(s)
    • A. 

      Many; 1

    • B. 

      1; many

  • 10. 
    Indicate the types of IPL synapses.
    • A. 

      Conventional dyad

    • B. 

      BP-BP

    • C. 

      Amacrine-amacrine

    • D. 

      Reciprocal

    • E. 

      Reverse

    • F. 

      Serial

  • 11. 
    What are the first and second most common IPL synapses in primate?
    • A. 

      1. amacrine-amacrine; 2. conventional dyad

    • B. 

      1. conventional dyad; 2. amacrine-amacrine

    • C. 

      1. conventional dyad; 2. serial

  • 12. 
    In an amacrine-amacrine synpase; one BP synapses with one amacrine which then synpases on another amacrine
    • A. 

      True

    • B. 

      False

  • 13. 
    A serial synapse in the IPL allows for:
    • A. 

      Informational integration

    • B. 

      Information amplification

    • C. 

      Information refinement

    • D. 

      2 of the above

    • E. 

      All of the above

  • 14. 
    In a reciprocal synapse in the IPL, information can flow both ways between a BP and a GC
    • A. 

      True

    • B. 

      False

  • 15. 
    Cats have ___ GCs and primates have___.
    • A. 

      2;3

    • B. 

      3;2

    • C. 

      3;3

  • 16. 
    Which type  of GC has the largest dendritic spread, axon diamter and cell body?
    • A. 

      Alpha

    • B. 

      Beta

    • C. 

      Gamma

  • 17. 
    Which type of GC has the smallest dendritic spread?
    • A. 

      Alpha

    • B. 

      Beta

    • C. 

      Gamma