Question :
51.For the sharpest vision, the image of an object should : 1231204
51.For the sharpest vision, the image of an object should be focused on the
A)fovea.
B)blind spot.
C)olfactory bulb.
D)optic nerve.
E)retina.
52.Who won the Nobel Prize for discovering that the visual cortex contains nerve cells that respond only to lines of particular orientations?
A)Ewald Hering
B)Thomas Young and Hermann von Helmholtz
C)Ronald Melzack and Patrick Wall
D)Gustav Theodor Fechner
E)David Hubel and Torsten Wiesel
53.Neurons that respond to specific characteristics of the visual stimulus are called
A)photoreceptors.
B)ganglion cells.
C)bipolar cells.
D)optic neurons.
E)feature detectors.
54.The role of feature detectors is to
A)compensate for retinal disparity in nearsightedness and farsightedness.
B)detect color stimuli.
C)detect black and white stimuli.
D)respond to particular features of visual stimuli.
E)regulate the size of the pupil.
55.Trichromatic theory suggests that
A)the retina has one type of color receptor that responds differently to each color.
B)the retina has two types of color receptors that respond in a different manner for each color.
C)the retina has three types of color receptors—red, green, and blue-violet.
D)color results from opposing processes involving three sets of color receptors: red-green, blue-yellow, and black-white.
E)the process of color vision differs in men and women because of sex-linked genetic defects on the Y chromosome.
56.Red, green, and blue-violet light can be combined to create any color of the spectrum. This has been interpreted as supporting
A)trichromatic theory of color vision.
B)opponent-process theory of color vision.
C)feature detection theory of color vision.
D)color constancy theory of color vision.
E)the existence of afterimages.
57.In color vision, blue-violet cones are most sensitive to _____ wavelengths, red cones to ______ wavelengths, and green cones to ______ wavelengths.
A)short; middle; long
B)short; long; middle
C)long; short; middle
D)long; middle; short
E)middle; short; long
58.An object that reflects primarily long wavelength light would most stimulate which category of cone?
A)blue-violet
B)green
C)red
D)yellow
E)black-white
59.Regarding the theories of color vision, which of the following is TRUE?
A)Trichromatic theory is supported by the behavior of cells lying between the cones and the occipital lobe of the cerebral cortex.
B)Opponent-process theory is supported at the receptor level.
C)Most authorities today suggest that color vision includes elements of both trichromatic and opponent-process theories.
D)Trichromatic theory is based on Hering’s work with afterimages.
E)Helmholtz showed that three primary colors of light could be mixed in different ways to create any color.
60.All but which of the following are suggested by opponent-process theory?
A)Black-white photoreceptors are responsible for detecting differences in brightness.
B)Continually staring at a green image will result in an afterimage of red.
C)Continually staring at a yellow image will result in an afterimage of blue.
D)Red-green receptors simultaneously transmit messages for red and green.
E)Afterimages are the eye’s attempt to maintain equilibrium between receptors.
