PSYCH 233 Module 5.1
In the human retina, messages go from receptors at the back of the eye to ____.
bipolar cells
Which receptors are responsible for the perception of color?
cones only
According to the law of specific nerve energies, the brain tells the difference between one sensory modality and another by ____.
which neurons are active
Why does the fovea provide the clearest, most detailed visual information?
It has tightly packed receptors.
Which statement is TRUE with regard to peripheral vision?
It is easier to recognize single objects in the periphery that are not surrounded by other objects.
____ are chemicals that release energy when struck by light.
Photopigments
According to the trichromatic theory of color vision, the most important factor in determining the color we see is the ____.
relative activity of short, medium, and long wavelengths
Why do humans perceive faint light better in the periphery of the eye?
More receptors in the periphery than in the fovea funnel input to each ganglion cell.
Light energy converts 11-cis-retinal to ____.
all-trans-retinal
The optic nerve is composed of axons from which kind of cell?
ganglion cells
The most common form of color vision deficiency is due to ____.
long- and medium-wavelength cones making the same photopigment
According to the trichromatic theory of color vision ____.
our perception of color depends on the relative activity of three types of cones
Light enters the eye through an opening in the center of the iris called the ____.
pupil
In comparison to cones, rods ____.
are more sensitive to dim light
The name of the point at which the optic nerve leaves the retina is called the ____.
blind spot
According to the retinex theory, we perceive color by ____.
contrasting the activity in one area of the visual field with that of the others
Color constancy is the ability to ____.
recognize the color of an object despite changes in lighting
Color and brightness constancy are best explained by the ____ theory of color vision.
retinex
Light from the right half of the world strikes which part of the retina?
the left half
At the level of rods and cones, the ____ theory seems to fit best, while at the level of the bipolar cells, the ____ theory seems to fit best.
trichromatic; opponent process
