Module 5.1 Quiz P-Psych

Which statement characterizes the fovea?​

It has the greatest perception of detail.

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.

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.

____ modify the ____ sensitivity to different wavelengths of light.​

Opsins; photopigments

Light energy converts 11-cis-retinal to ____.​

all-trans-retinal

In comparison to cones, rods ____.​

are more sensitive to dim light

Which receptors are responsible for the perception of color?​

cones only

According to the retinex theory, we perceive color by ____.​

contrasting the activity in one area of the visual field with that of the others

The law of specific nerve energies states that ____.​

every stimulation of the optic nerve is perceived as light

The optic nerve is composed of axons from which kind of cell?​

ganglion cells

Chemicals that release energy when struck by light are called ____.​

photopigments

In what order does visual information pass through the retina?​

receptor cells, bipolar cells, ganglion cells

Color constancy is the ability to ____.​

recognize the color of an object despite changes in lighting

Difficulty distinguishing between ____ and ____ is the most common form of color vision deficiency.​

red; green

Color and brightness constancy are best explained by the ____ theory of color vision.​

retinex

In comparison to the rods, cones are more ____.​

sensitive to detail

According to the law of specific nerve energies, the brain tells the difference between one sensory modality and another by ____.​

which neurons are active

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

The most common form of color vision deficiency is due to ____.​

​long- and medium-wavelength cones making the same photopigment