Morphology Of The Opl And IPL (Em)

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1. A cone pedicle has more invaginations than a rod spherule.

Explanation

Cones have 12-25 invaginations/pedicle and rods have 1 invag/spherule....this is because the cone pedicle is much larger than the rod spherule

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About This Quiz
Morphology Of The Opl And IPL (Em) - Quiz

Explore the intricate morphology of the outer plexiform layer (OPL) and inner plexiform layer (IPL) in this focused quiz. Assess your understanding of synaptic arrangements in rods and... see morecones, distinguishing features of cone pedicles and rod spherules, and the functional pathways in cone synapses. see less

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

Explanation

Non-invaginating synapses are typically with a flat BP

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

Explanation

Diffuse bipolar cells (BPs) make contact with multiple cones, while midget bipolar cells (BPs) only make contact with a single cone. This means that diffuse BPs receive input from a broader range of cones, allowing for more generalized visual information processing. On the other hand, midget BPs have a more specific connection with a single cone, enabling them to relay detailed information about color and fine visual details.

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

Explanation

Alpha neurons typically have the largest dendritic spread, axon diameter, and cell body compared to beta and gamma neurons. This means that alpha neurons have more extensive branching of their dendrites, a larger diameter for their axons, and a larger cell body. These characteristics allow alpha neurons to transmit signals over longer distances and integrate information from a larger number of inputs.

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

Explanation

The first and second most common IPL synapses in primate are the conventional dyad and amacrine-amacrine synapses.

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6. How many different BPs are there in primates?

Explanation

There are seven different BPs in primates.

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7. Cats have ___ GCs and primates have___.

Explanation

Gatos: alpha, beta, gamma
Primates: P-alpha; P-beta

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8. Which type of GC has the smallest dendritic spread?

Explanation

The dendritic spread will tell us how far from the cell body the cell is getting info from

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

Explanation

In rod ribbon synapses, there is no junction btw the laterally placed H cells (like those of the cone pedicles). Cone horizontal cells are separated by glial tissue, but as the glial tissue thins you start to get adherent (gap) junctions

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10. Indicate the types of IPL synapses.

Explanation

The types of IPL synapses indicated in the answer are conventional dyad, amacrine-amacrine, reciprocal, and serial. A conventional dyad synapse refers to a synapse between a bipolar cell and a ganglion cell. An amacrine-amacrine synapse occurs between two amacrine cells. A reciprocal synapse involves the exchange of signals between two neurons. A serial synapse refers to a chain of synapses where the output of one synapse becomes the input for the next synapse.

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11. A serial synapse in the IPL allows for:

Explanation

a and c are correct

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

Explanation

We can stain connexins in order to locate gap junctions

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

Explanation

in this synapse, 1 BP synapses with 2 amacrines.

In a serial synapse; 1 BP syns with 1 amacrine and then that amacrine syns with another amacrine which syns with a GC

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14. Rods typically have more than 1 central process.

Explanation

Rods have more than 3 processes that synapse due to more central processes.

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15. Gap junctions:

Explanation

a and b are true. c would be true if it said, CONE ribbon synapses instead of rod

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

Explanation

Info can flow both ways between a BP and an amacrine cell --> this allwos the amacrine cell to determine what info it gets from the BP cell (feedback loop)

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A cone pedicle has more invaginations than a rod spherule.
In cones, the invaginating synapses are involved in the ___ pathway...
Diffuse BPs contact ____ cone(s) and midget BPs contact ____ cone(s)
Which type  of GC has the largest dendritic spread, axon diamter...
What are the first and second most common IPL synapses in primate?
How many different BPs are there in primates?
Cats have ___ GCs and primates have___.
Which type of GC has the smallest dendritic spread?
In cone ribbon synapses, the horizontal cells are NOT connected by gap...
Indicate the types of IPL synapses.
A serial synapse in the IPL allows for:
Adherent junctions are made of ___ gap junctions which are made of...
In an amacrine-amacrine synpase; one BP synapses with one amacrine...
Rods typically have more than 1 central process.
Gap junctions:
In a reciprocal synapse in the IPL, information can flow both ways...
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