Which of the following statement is correct? [3 Marks]

A. Small intestine is the site for complete digestion of food.
B.The exit of undigested food from the body is controlled by pyloric sphincter.
C. Herbivores eating grass need a longer small intestine to allow complete digestion of cellulose.
D. Absorption of digested food takes place in large intestine with the help of villi.

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Solution

Complete digestion takes place in the small intestine as it finally absorbs the nutrients.
[0.5 Marks]

It is the site of the complete digestion of carbohydrates, proteins and fats.
[0.5 Marks]

Herbivores consume plant and grass-based food which is full of cellulose and the digestion of cellulose takes a long time. Hence their small intestine is longer when compared to carnivores.
[1.5 Marks]

Hence, the correct answer is (A) and (C).
[0.5 Marks]

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Similar questions

Tick mark the correct answer in each of the following:

(a)Fat is completely digested in the

(i)stomach

(ii)mouth

(iii)small intestine

(iv)large intestine

(b)Water from the undigested food is absorbed mainly in the

(i)stomach

(ii)food pipe

(iii)small intestine

(iv)large intestine

Q. The last part of digestion of food takes place in the

(a) stomach
(b) small intestine
(c) large intestine
(d) oesophagus

Q. The greatest amount of digestion of food in humans takes place in the

(a) mouth
(b) stomach
(c) small intestine
(d) large intestine

Rewrite the following in the correct sequence as directed within the brackets.
Water absorbed, Undigested food pass into large intestine. Formation of faeces, Absorption of digested nutrients by villi, Egestion (processes in small intestine and large intestine)

Read the given paragraph where few words have been italicised.

Buccal cavity of humans contains two pairs of salivary glands which secrete digestive juices that help in digestion of proteins present in food. From here food enters stomach where digestion of mainly fats takes place.
As this semi-digested food enters small intestine complete digestion of food occurs. Small intestine receives bile juice from pancreas which digests fats.
Most absorption of water occurs in large intestine.

Select the correct option regarding this.

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