Exam 8: Vision: From Eye to Brain

Which statement regarding visual fields is true?

Quanta of light that enter the eye are captured in rod cells by

Describe the opposing effects of glutamate on bipolar cells and how these effects relate to lateral inhibition.

When you look at the blue sky on clear day, your perception of the blue color is produced by

In _______ cells, light falling in the center of the cell causes excitation, and light falling in the surround causes inhibition.

According to the _______ model, the visual system analyzes the number of cycles of light-dark (or color) patches in any stimulus.

At any given time, a photoreceptor operates approximately over a _______-fold range of brightness.

In the condition called _______, the eyeball is too long, causing the cornea and lens to focus images in front of the retina instead of on it.

What is macular degeneration? Describe the differences between "dry" macular degeneration and "wet" macular degeneration? Which type is more common? Which type is more severe?

In _______, individuals can identify objects, but have trouble using their vision to reach for and grasp them.

The most common age-related cause of vision loss is

In _______, the interconnected neurons inhibit adjacent cells, resulting in contrast at the edge of regions.

Describe how true color perception is produced in the cortex and the ways that color information is used to improve the accuracy of visual perception.

When a gene carrying a third photopigment was introduced into photoreceptors of adult male squirrel monkeys with dichromatic vision, the monkeys

In the scotopic system, the relationship between the number of visual receptor cells and the number of ganglion cells demonstrates a _______ of information.

Explain the three ways the eye responds to the vastly different light intensities it encounters.

What is responsible for the lack of photoreceptors at the optic disc and consequent blind spot?

The human visual system responds within very narrow range of the electromagnetic range: from about _______ nanometers.

What features of the visual system of a prey animal, such as a rabbit, serve to better detect predators?

Damage to cortical area V5 results in an inability to perceive