What type of control is shown by the pupil becoming smaller in bright light?
Answer and explanation
Correct answer: Involuntary nervous control
Bright light acts as a stimulus detected by the eye. Circular muscles in the iris contract automatically, reducing the pupil’s diameter and limiting the amount of light entering the eye. Because this adjustment occurs without conscious choice and is coordinated through the nervous system, option A is correct. It is not voluntary hormonal control, plant hydrotropism, or insulin production in muscle.
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What is the correct answer to this question?
Involuntary nervous control
Why is this the correct answer?
Bright light acts as a stimulus detected by the eye. Circular muscles in the iris contract automatically, reducing the pupil’s diameter and limiting the amount of light entering the eye. Because this adjustment occurs without conscious choice and is coordinated through the nervous system, option A is correct. It is not voluntary hormonal control, plant hydrotropism, or insulin production in muscle.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Nervous system.
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