Morphology Of The Opl And IPL (Em)

In cones, the invaginating synapses are involved in the ___ pathway and the flat synapses are involved in the ___ pathway.

• Off; on

• On; off

Diffuse BPs contact ____ cone(s) and midget BPs contact ____ cone(s)

• Many; 1

• 1; many

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

• Alpha

• Beta

• Gamma

What are the first and second most common IPL synapses in primate?

• 1. amacrine-amacrine; 2. conventional dyad

• 1. conventional dyad; 2. amacrine-amacrine

• 1. conventional dyad; 2. serial

How many different BPs are there in primates?

• 1

• 5

• 7

Cats have ___ GCs and primates have___.

• 2;3

• 3;2

• 3;3

Which type of GC has the smallest dendritic spread?

• Alpha

• Beta

• Gamma

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

• True

• False

Indicate the types of IPL synapses.

• Conventional dyad

• BP-BP

• Amacrine-amacrine

• Reciprocal

• Reverse

• Serial

A serial synapse in the IPL allows for:

• Informational integration

• Information amplification

• Information refinement

• 2 of the above

• All of the above

Adherent junctions are made of ___ gap junctions which are made of _______ (protein)

• 1; connexins

• 3; microtubules

• 3; connexins

In an amacrine-amacrine synpase; one BP synapses with one amacrine which then synpases on another amacrine

• True

• False

Rods typically have more than 1 central process.

• True

• False

Gap junctions:

• Connect all photoreceptors to each other

• Electrically couple photoreceptors

• Are found between horizontal cells in rod ribbon synapses

• 2 of the above

• All of the above

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

• True

• False

Describe the post synaptic cell arrangement in cone ribbon synapses.