Question 1

Layers 1 and 2 of the LGN receive input from the __________________while layers 3 through 6 receive input from the __________________.

Accepted Answer

A)   P pathway; K pathway
B)   K pathway; P pathway
C)   M pathway; K pathway
D)   M pathway; P pathwayE) All of the above
F) A) and C)

Question 2

Layer 4C of the visual cortex:

Accepted Answer

A)   is not sensitive to orientation.
B)   has a retinotopic arrangement.
C)   is the ending point of cells from the LGN.
D)   all of the aboveE) A) and D)
F) A) and B)

Question 3

Which of the following statements about blobs is TRUE?

Accepted Answer

A)   They are sensitive to orientation.
B)   They receive input from the M pathway.
C)   They are connected to adjacent blobs.
D)   They provide color information.E) A) and B)
F) B) and D)

Question 4

The figure below shows the parts of the visual pathway from the eye to the brain. 
 
-Identify the lateral geniculate nucleus.

Accepted Answer

A)   C
B)   D
C)   E
D)   FE) None of the above
F) A) and B)

Question 5

Floaters are caused by:

Accepted Answer

A)   the thickening of the lens
B)   a misshapen cornea
C)   solid matter suspended in the vitreous humor
D)   solid matter suspended in the aqueous humorE) B) and D)
F) A) and B) C

Question 6

Hyperpolarization occurs when:

Accepted Answer

A)   the electric potential of a photoreceptor goes from a negative resting state to a more negative state.
B)   the electric potential of a photoreceptor goes from a negative resting state to a positive state.
C)   the electric potential of a photoreceptor goes from a positive resting state to a negative state.
D)   the electric potential of a photoreceptor goes from a positive resting state to a more positive state.E) C) and D)
F) All of the above

Question 7

Which of the following physical characteristics of light is associated with perceived brightness?

Accepted Answer

A)   purity
B)   amplitude
C)   hue
D)   wavelengthE) C) and D)
F) B) and D) B

Question 8

The rods and cones transduce light energy by means of chemical substances called:

Accepted Answer

A)   retinoids
B)   scleras
C)   choroids
D)   photopigmentsE) B) and C)
F) All of the above

Question 9

Which of the following statements about photoreceptors is TRUE?

Accepted Answer

A)   M-cones are rare
B)   S-cones are rare
C)   L-cones are rare
D)   all of the aboveE) B) and D)
F) C) and D)

Question 10

Now suppose a ganglion cell has an off-center, on-surround receptive field. What will be the result when…
-… a light is shined on the entire receptive field?

Accepted Answer

A)   the cell will show activation
B)   the cell will show inhibition
C)   the cell will fire spontaneously at a low rate
D)   the cell will show only slight activationE) C) and D)
F) None of the above

Question 11

Suppose a ganglion cell has an on-center, off-surround receptive field. What will be the result when…
-…no light is shined on the receptive field?

Accepted Answer

A)   the cell will show activation
B)   the cell will show inhibition
C)   the cell will fire spontaneously at a low rate
D)   the cell will show only slight activationE) C) and D)
F) None of the above C

Question 12

Complex Cortical Cells are found in:

Accepted Answer

A)   Layers 2, 3, 5, and 6 of the primary visual cortex.
B)   Only layer 4B of the primary visual cortex.
C)   Only layer 4C of the primary visual cortex.
D)   All 6 layers of the primary visual cortex.E) A) and D)
F) C) and D)

Question 13

Which of the following statements is NOT true about cones?

Accepted Answer

A)   They shed their discs in the early morning.
B)   They have a tapered tip.
C)   They rely on three photopigments.
D)   They provide our perception of color.E) None of the above
F) A) and D)

Question 14

Vision that relies only on cones is called:

Accepted Answer

A)   achromatic vision
B)   scotopic vision
C)   mesopic vision
D)   photopic visionE) A) and B)
F) A) and C)

Question 15

Which of the following statements about the left and right superior colliculi is FALSE?

Accepted Answer

A)   They integrate information from various senses.
B)   They are comprised of multiple layers.
C)   They receive information from the opposite visual field.
D)   They are located within the thalamus.E) B) and C)
F) B) and D)

Question 16

Which of the following statements is NOT true about rods?

Accepted Answer

A)   There are approximately 100 million in each human eye.
B)   They are concentrated in the center of the fovea.
C)   They function best under dimly lit conditions.
D)   They rely on one photopigment: rhodopsinE) A) and D)
F) B) and C)

Question 17

The area between the retina and the lens is called the:

Accepted Answer

A)   fovea
B)   posterior chamber
C)   anterior chamber
D)   optic discE) A) and B)
F) A) and C)

Question 18

The extrastriate cortex is also known as:

Accepted Answer

A)   the primary visual cortex
B)   the secondary visual cortex
C)   V1
D)   the inferotemporal cortexE) None of the above
F) A) and B)

Question 19

A wavelength is:

Accepted Answer

A)   the physical characteristic related to perceived brightness
B)   the psychological perception of color
C)   the height of the light wave
D)   the distance between two peaks of the waveE) All of the above
F) A) and C)

Question 20

The figure below is a side view of the human eye. 
-Identify the iris.

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) B) and C)
F) A) and B)

Exam 3: The Visual System

Layers 1 and 2 of the LGN receive input from the __________________while layers 3 through 6 receive input from the __________________.

Correct AnswerverifiedShow Answer

Layer 4C of the visual cortex:

Correct AnswerverifiedShow Answer

Which of the following statements about blobs is TRUE?

Correct AnswerverifiedShow Answer

The figure below shows the parts of the visual pathway from the eye to the brain. -Identify the lateral geniculate nucleus.

Correct AnswerverifiedShow Answer

Floaters are caused by:

Correct AnswerverifiedC

Hyperpolarization occurs when:

Correct AnswerverifiedShow Answer

Which of the following physical characteristics of light is associated with perceived brightness?

Correct AnswerverifiedB

The rods and cones transduce light energy by means of chemical substances called:

Correct AnswerverifiedShow Answer

Which of the following statements about photoreceptors is TRUE?

Correct AnswerverifiedShow Answer

Now suppose a ganglion cell has an off-center, on-surround receptive field. What will be the result when… -… a light is shined on the entire receptive field?

Correct AnswerverifiedShow Answer

Suppose a ganglion cell has an on-center, off-surround receptive field. What will be the result when… -…no light is shined on the receptive field?

Correct AnswerverifiedC

Complex Cortical Cells are found in:

Correct AnswerverifiedShow Answer

Which of the following statements is NOT true about cones?

Correct AnswerverifiedShow Answer

Vision that relies only on cones is called:

Correct AnswerverifiedShow Answer

Which of the following statements about the left and right superior colliculi is FALSE?

Correct AnswerverifiedShow Answer

Which of the following statements is NOT true about rods?

Correct AnswerverifiedShow Answer

The area between the retina and the lens is called the:

Correct AnswerverifiedShow Answer

The extrastriate cortex is also known as:

Correct AnswerverifiedShow Answer

A wavelength is:

Correct AnswerverifiedShow Answer

The figure below is a side view of the human eye. -Identify the iris.

Correct AnswerverifiedShow Answer

Layers 1 and 2 of the LGN receive input from the while layers 3 through 6 receive input from the .

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C

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B

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C

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