Which of the following information about Photoreceptors is incorrect?A) When exposed to light, retinal changes its shape (isomerization).B) Under prolonged exposure to light, retinal detaches from opsin (visual pigment bleaching).C) Opsin and retinal should be attached again in order to reach to the light.D) When visual pigments are bleached, they cannot react to the light anymore.E) Photoreceptors become more responsive to the light due to prolonged exposure to the light.
Question
Which of the following information about Photoreceptors is incorrect?A) When exposed to light, retinal changes its shape (isomerization).B) Under prolonged exposure to light, retinal detaches from opsin (visual pigment bleaching).C) Opsin and retinal should be attached again in order to reach to the light.D) When visual pigments are bleached, they cannot react to the light anymore.E) Photoreceptors become more responsive to the light due to prolonged exposure to the light.
Solution
The incorrect statement is E) Photoreceptors become more responsive to the light due to prolonged exposure to the light.
In fact, the opposite is true. Prolonged exposure to light actually decreases the responsiveness of photoreceptors. This is a process known as adaptation. When photoreceptors are exposed to high levels of light, they adjust to reduce their sensitivity, preventing overstimulation. This is why it takes time for our eyes to adjust when we move from a bright environment to a darker one.
Similar Questions
Which of the following information about visual pigment regeneration is incorrect?A) When exposed to light, retinal changes its shape (isomerization).B) Under prolonged exposure to light, retinal detaches from opsin (visual pigment bleaching).C) Opsin and retinal should be attached again in order to reach to the light.D) When visual pigments are bleached, they cannot react to the light anymore.E) Photoreceptors become more responsive to the light due to prolonged exposure to the light.
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