Morphology Of The Opl And IPL (Em)

17 Questions | By Tseemore | Last updated: Mar 22, 2022 | Total Attempts: 70

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P. 156-158

Questions and Answers

1.

Describe the post synaptic cell arrangement in cone ribbon synapses.
2.

A cone pedicle has more invaginations than a rod spherule.
- A.
  
  True
- B.
  
  False
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