Chapter 17 part 2 of Eye

What is the primary function of rods in the human eye?

• Provide color vision

• Sharp clear images

• Do not discriminate light colors/detection of shapes/silhouettes

• Require plentiful light

Which type of photoreceptor is highly sensitive to light allowing them to function in even dim conditions?

• Cones

• Rods

• Both rods and cones

• Neither rods nor cones

What do cones in the human eye require to function effectively?

• Darkness

• Plentiful light

• Low light

• No light

Which photoreceptor is responsible for sensing shapes in the dark?

• Cones

• Rods

• Both rods and cones

• Neither rods nor cones

What is the Fovea Centralis known for?

• It contains the highest concentration of rods.

• It provides the sharpest vision as it contains the highest concentration of cones.

• It is located at the edge of the retina.

• It is responsible for peripheral vision.

Where is the Fovea Centralis located?

• At the center of the macula.

• At the edge of the cornea.

• In the optic nerve.

• In the lens.

Which cells in the retina are responsible for detecting light?

• Horizontal cells

• Rods and cones

• Amacrine cells

• Ganglion cells

What is the origin of the optic nerve?

• The fovea

• The optic disc

• The cornea

• The retina

Why is the optic disc considered a blind spot?

• It has the highest concentration of photoreceptors

• It is covered by the lens

• It lacks photoreceptors

• It is the origin of the optic nerve

What does the diagram demonstrate?

• The presence of a blind spot

• The concept of peripheral vision

• The function of the retina

• The process of color vision