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Visual Coding Chapter 12

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Questions and Answers

What is the main function of the retina?

To control the size of the pupil

To focus the light entering the eye

To convert light into electrical impulses (correct)

To adjust the lens for clear vision

According to the law of specific nerve energy, how is information coded in the brain?

Based on the intensity of light perceived

Based on the location of the visual receptors

Based on the specific neurons that are active (correct)

Based on the size of the pupil

Which cells are responsible for sending messages to the ganglion cells in the eye?

Amacrine cells

Cornea cells

Visual receptors

Bipolar cells (correct)

What is the role of amacrine cells in visual processing?

Receiving information from bipolar cells Signup and view all the answers

What is the function of the lens in the eye?

To adjust visual acuity for near or far objects Signup and view all the answers

What is the specific role of ganglion cells in visual processing?

Joining axons together and transmitting information to the brain Signup and view all the answers

What is the function of amacrine cells in the visual system?

Refining the input to ganglion cells to respond to particular visual features Signup and view all the answers

What is the main characteristic of midget ganglion cells located in the fovea?

They are small and respond to just a single cone Signup and view all the answers

Which type of cells provide 70 percent of the input to the brain for vision?

Midget ganglion cells Signup and view all the answers

What is the main function of rods in the retina?

Responsible for night vision in faint light Signup and view all the answers

What is the role of photopigments in the visual system?

Releasing energy when struck by light Signup and view all the answers

According to Thomas Young's trichromatic theory of color vision, how do we perceive color?

Through comparing the responses across few types of receptors Signup and view all the answers

What does opponent-process theory propose about color perception?

We perceive color in terms of opposites Signup and view all the answers

According to Edwin Land's retinex theory, what does color constancy refer to?

The ability to perceive stable colors despite changes in lighting Signup and view all the answers

What is the main characteristic of foveal vision?

Better acuity or sensitivity to detail Signup and view all the answers