A farmer in Guyana notices that when bright sunlight suddenly enters the barn, his pupils become smaller. Which type of response is this?

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Question

A farmer in Guyana notices that when bright sunlight suddenly enters the barn, his pupils become smaller. Which type of response is this?

Accepted Answer

Reflex action that protects the retina — Award 1 mark for identifying the pupil reflex as a protective mechanism. A is incorrect — pupil constriction is involuntary and automatic. C is incorrect — this is an innate reflex, not learned behaviour. D is incorrect — conditioned responses require training; the pupil reflex is unconditioned.

Answer

Reflex action that protects the retina

Answer

Conditioned response to the environment

Answer

Learned behaviour from repeated exposure

Answer

Voluntary action controlled by the cerebrum

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