According to the opponent-process theory of color vision which of the following statements is TRUE?
A)Red-green color blindness is caused by the absence of the red-green opponent pair.
B)Cones are sensitive to either red, green, yellow, or blue.
C)Red and blue receptors cannot be stimulated simultaneously; if one is activated, the other is inhibited.
D)Red and green receptors cannot be stimulated simultaneously; if one is activated, the other is inhibited.

Question

Quizplus · Accepted Answer

The opponent-process theory of color vision suggests that there are three opponent pairs of color receptors: red-green, blue-yellow, and black-white. According to this theory, activation of one member of an opponent pair inhibits the other. Therefore, if the red receptors are activated, the green receptors are inhibited and vice versa, resulting in red-green color vision deficiency or color blindness. Choice A is incorrect because it suggests the absence of a single opponent pair, whereas the opponent-process theory suggests three opponent pairs. Choice B is incorrect because cones are sensitive to a range of wavelengths, not just the four mentioned in the statement. Choice C is incorrect because the opponent-process theory suggests that red and blue are part of different opponent pairs and they can be activated simultaneously.

According to the Opponent-Process Theory of Color Vision Which of the Following