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Chapter 9: Problem 7

__________ theory states that there are three types of cones in the retina, each of which responds primarily to a different color.

Short Answer

Expert verified
The Trichromacy theory states that there are three types of cones in the retina, each of which responds primarily to a different primary color: red, green, or blue. This theory explains color vision in humans.

Step by step solution

01

Understand the question and Trichromacy Theory

The question refers to the trichromacy or three-color theory. This theory is an important model in visual neuroscience describing how humans perceive color. According to it, there are three types of color receptor cells or cones in the retina. Since the exercise is asking for the theory that accounts for these types of cones, the answer should be the trichromacy theory.
02

Identify the main types of cones

According to the trichromacy theory, the three types of cone cells in the human eye correspond to the primary colors: red, green, and blue. Each type of cone is stimulated by different wavelength ranges with red cones responding most strongly to long wavelength light, green to medium, and blue to short wavelength light.
03

Connect theory and facts

The trichromacy theory explains color vision in terms of the combined activity of these three different types of photoreceptor cells in the eye. We see different colors because our brain compares the signals from these cells, thus creating our perception of color.

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