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Science · 2024 · 2 marks
CBSE 2024 · Region 1 · Set 1 · Q22
State one role of each of the following in human digestive system :(i)Hydrochloric acid(ii)Villi(iii)Anal Sphincter(iv)Lipase
State one role of each of the following in human digestive system :
(i)
Hydrochloric acid
(ii)
Villi
(iii)
Anal Sphincter
(iv)
Lipase
Marking-scheme solution
Role of:
(i)
Hydrochloric acid: Creates an acidic medium for facilitating the action of enzyme / kills microorganisms.
(ii) Villi: Increases the surface area for absorption of digested food.
(iii) Anal Sphincter: Exit of waste material from anus is regulated.
(iv)
Lipase: Breakdown / digestion of emulsified fats or lipids
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CBSE Class 10 Science past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.