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VISION QUESTION |
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| (a) | The human retina contains two types of photoreceptor cells, rod cells and cone cells. | ||
| (i) | What is the name given to the region of the retinal that contains the highest density of cone cells | ||
(1) |
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| (ii) | Describe how a rod cell reacts to light and causes an impulse to be transmitted through the optic nerve. | ||
(5) |
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| (iii) | Explain the way in which cone cells allow us to see colour | ||
(4) |
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