Which of These Is Most Responsible for "Light Adaptation"--The Process

question 65

Multiple Choice

Which of these is most responsible for "light adaptation"--the process by which we only gradually become able to see objects in a brightly lit place after being in the dark?

• A)Cone receptors are very hyperpolarized in the dark,and they must be exposed to bright light for awhile before they will depolarize.
• B)Rhodopsin is quickly inactivated so rods become unresponsive,and the higher-acuity cones then become the main detectors of vision.
• C)Because rods are more sensitive to light than cones,they gradually become extremely activated in bright light.
• D)Cones and rods are stimulated equally,leading to difficulties in interpreting the sensory inputs to the brain
• E)Rhodopsin is not activated by colored light,and the lack of stimulation causes rods to gradually depolarize when we are exposed to bright light.

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