Row Stimulus Response A bright light pupil becomes wider B dim light pupil becomes narrower C bright light pupil becomes narrower D dim light lens becomes t...
Question 1 Report
| Row | Stimulus | Response |
|---|---|---|
| A | bright light | pupil becomes wider |
| B | dim light | pupil becomes narrower |
| C | bright light | pupil becomes narrower |
| D | dim light | lens becomes thinner to focus near objects |
The table pairs a stimulus with the response a person makes. Which row shows a correct stimulus-and-response pairing for the eye in changing light?
Answer Details
In bright light the pupil narrows to protect the retina, so the correct stimulus-and-response pairing is bright light with the pupil becoming narrower, which is Row C. Rows that pair bright light with a wider pupil, or dim light with a narrower pupil, get the response the wrong way round, since dim light actually widens the pupil to let more light in.
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