Retina

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Questions and Answers

Which type of neuroglial cell is responsible for providing structural support and forming the internal limiting membrane in the retina?

  • Müller cells (correct)
  • Bipolar cells
  • Astrocytes
  • Microglial cells

Which type of ganglion cell has larger diameter axons and is sensitive to changes in dim illumination?

  • Parvocellular cells
  • P-cells
  • Midget ganglion cells
  • M-cells (correct)

Where is the nerve fiber layer (NFL) thickest in the retina?

  • Evenly distributed throughout the retina
  • At the fovea
  • In the papillomacular bundle
  • At the optic nerve head margin (correct)

What is the primary role of neuroglial cells in the retina?

<p>Providing structural support (B)</p> Signup and view all the answers

Which type of ganglion cell has a single dendrite that synapses with one midget bipolar cell in the fovea?

<p>Midget ganglion cells (D)</p> Signup and view all the answers

Where are the astrocytes found in the retina?

<p>Over the optic disc, replacing the Müller cells (C)</p> Signup and view all the answers

Which of the following cell types are directly involved in the conduction of visual signals from the retina to the brain?

<p>Ganglion cells (A)</p> Signup and view all the answers

In the foveola region of the macula lutea, which retinal layer is discontinuous?

<p>Inner nuclear layer (D)</p> Signup and view all the answers

What is the primary function of the Henle's fiber layer in the retina?

<p>To contain the axons of photoreceptors in an oblique orientation (B)</p> Signup and view all the answers

In the peripheral retina, what structural change occurs to the nuclear and plexiform layers?

<p>They merge with each other into a single layer (B)</p> Signup and view all the answers

What is the function of the ora serrata in the peripheral retina?

<p>To mark the transition from the neural retina to the non-pigmented epithelium (D)</p> Signup and view all the answers

In the parafovea region of the macula lutea, which retinal layer is the thickest?

<p>Inner nuclear layer (B)</p> Signup and view all the answers

Which of the following is not a function of Müller cells in the retina?

<p>Facilitating the transmission of visual signals to the optic nerve (B)</p> Signup and view all the answers

Which type of glial cell in the retina is responsible for the immune defense and inflammation response?

<p>Microglial cells (B)</p> Signup and view all the answers

Which layer of the retina contains the nerve fibers that transmit visual information from the retinal ganglion cells to the optic nerve?

<p>Nerve fiber layer (B)</p> Signup and view all the answers

What is the primary function of astrocytes in the retina?

<p>Maintaining the blood-retinal barrier (C)</p> Signup and view all the answers

Which retinal layer contains the cell bodies of the retinal ganglion cells?

<p>Ganglion cell layer (B)</p> Signup and view all the answers

Which retinal layer is responsible for the phagocytosis and removal of cellular debris?

<p>Retinal pigment epithelium (D)</p> Signup and view all the answers

Which retinal layer contains the cell bodies of the bipolar, horizontal, and amacrine cells?

<p>Inner nuclear layer (B)</p> Signup and view all the answers

What is the primary function of the outer plexiform layer in the retina?

<p>Transmitting visual signals from the photoreceptors to the bipolar cells (D)</p> Signup and view all the answers

Which retinal layer contains the cell bodies of the photoreceptor cells (rods and cones)?

<p>Outer nuclear layer (C)</p> Signup and view all the answers

What is the main function of the internal limiting membrane in the retina?

<p>Providing structural support to the retinal neurons (D)</p> Signup and view all the answers

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