The sudden constriction of the pupil when bright light falls on the eye is an example of
- A. a reflex action
- B. a conditioned response
- C. a voluntary movement
- D. a hormonal effect
Explanation
The pupil reflex is automatic, rapid and involuntary, integrated in the brain stem, meeting every criterion of a reflex. It happens even in sleep, which shows that no conscious control or learning is involved.
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