
(B)
To describe: The three changes that occur in the visual pigments during the photoreception.
Introduction: The visual pigments are the light absorbing molecules that facilitate the process of visual pathway. It consists of an apoprotein called opsin, which is the integral membrane protein with seven transmembrane regions. There are two photoreceptor cells present in the retina, namely rods and cones.
(C)
To identify: The requirement of ATP molecule during the photoreception.
Introduction: The photoreception is the mechanism of light detection that results in vision. It is the response to the light stimuli. There are two photoreceptors cells present in the retina. They are rod cells and cone cells. These cells contain visual pigments called rhodopsin and photopsin that detect the light stimuli and convert them into the electro-chemical impulses.

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Chapter 15 Solutions
EBK VISUAL ANATOMY & PHYSIOLOGY
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