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Sneezing, coughing and the winking of eyes when dust enters are inbuilt, unlearned automatic responses. They are best classified as which type of reflex?
AConditioned reflexes
BAcquired reflexes
CSimple reflexes
DVoluntary actions
Answer & Solution
Correct answer: C. Simple reflexes
1. These responses are inbuilt and happen without learning or thinking.
2. Conditioned and acquired reflexes both come from practice and training, ruling out options A and B.
3. Voluntary actions are under conscious control, the opposite of automatic, ruling out option D.
4. Inbuilt, unlearned reflexes are simple reflexes, option C.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 15 Nervous System "Reflex Action", p.231_
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