Science
State one role of each of the following in human digestive system:
(a) Hydrochloric acid
(b) Villi
(c) Anal Sphincter
(d) Lipase
Answer
(a) Hydrochloric acid : Makes the food acidic in the stomach to provide the medium required for pepsin to act on proteins.
(b) Villi : Increase the surface area of the small intestine for absorption of digested food into the blood.
(c) Anal sphincter : Controls the opening and closing of the anus, thereby regulating the removal of undigested food (faeces) from the body.
(d) Lipase : Digests fats into fatty acids and glycerol.
Related Questions
Assertion (A) : The rainbow is a natural spectrum of sunlight in the sky.
Reason (R) : Rainbow is formed in the sky when the sun is overhead and water droplets are also present in air.
options
- (A) and (R) are true and (R) is the reason for (A).
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- (A) is true, but (R) is false.
- (A) is false, but (R) is true.
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