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Science · 2025 · 3 marks
CBSE 2025 · Region 2 · Set 2 · Q29
(a) What is meant by reflex arc? Where are they formed in the human body? (b) Why have reflex arcs evolved in animals?
(a)
What is meant by reflex arc ? Where are they formed in the human body ?
(b)
Why have reflex arcs evolved in animals?
Marking-scheme solution
(a)
The process of detecting the signal or the input and responding to it by an output action, completed quickly. Such a connection is called as reflex arc /A pathway followed during reflex action is called reflex arc./
Reflex arc is formed in the spinal cord.
(b)
Reflex arcs have evolved in animals because the thinking process of the brain is not fast enough. /Brain may take longer time to respond.
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.