A reflex occurs the iris of the human eye in response to changes in light levels - describe how these changes occur, referring to the changes in light level in your answer.
I would most likely present a figure of a dilated & undilated pupal and hopefully this will begin their thought process.
To receive full marks for this answer, I will be looking for the below points:• pupils dilate in low light levels because• circular muscles (in iris) relax • (and) radial muscles contract
BS
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