NCERT Solutions for Class 7 Science Chapter 2

Nutrition in Animals Class 7

Chapter 2 Nutrition in Animals Exercise Solutions

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Exercise : Solutions of Questions on Page Number : 20

Q1 :  

Fill in the blanks:

(a) The main steps of nutrition in humans are __________, __________, ___________, __________ and __________

(b) The largest gland in the human body is __________.

(c) The stomach releases hydrochloric acid and ________ juices which act on food.

(d) The inner wall of the small intestine has many finger-like outgrowths called __________.

(e) Amoeba digests its food in the __________.


Answer :

(a) The main steps of nutrition in humans are __ingestion__, __digestion__, __absorption__, __assimilation__ and __egestion__.

(b) The largest gland in the human body is __liver__.

(c) The stomach releases hydrochloric acid and __digestive__ juices which act on food.

(d) The inner wall of the small intestine has many finger-like outgrowths called __villi__.

(e) Amoeba digests its food in the _food vacuole_.

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Q2 :  

Mark 'T' if the statement is true and 'F' if it is false:

(a) Digestion of starch starts in the stomach. (T/F)

(b) The tongue helps in mixing food with saliva. (T/F)

(c) The gall bladder temporarily stores bile. (T/F)

(d) The ruminants bring back swallowed grass into their mouth and chew it for some time. (T/F)


Answer :

(a) Digestion of starch starts in the stomach. (F)

(b) The tongue helps in mixing food with saliva. (T)

(c) The gall bladder temporarily stores bile. (T)

(d) The ruminants bring back swallowed grass into their mouth and chew it for some time. (T)

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Q3 :  

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


Answer :

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Q4 :  

Match the items of Column I with those given in Column II:

Column I

Column II

Food components

Product(s) of digestion

Carbohydrates

Fatty acids and glycerol

Proteins

Sugar

Fats

Amino acids


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Q5 :  

What are villi? What is their location and function?


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Q6 :  

Where is the bile produced? Which component of the food does it help to digest?


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Q7 :  

Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.


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Q8 :  

Why do we get instant energy from glucose?


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Q9 :  

Which part of the digestive canal is involved in:

(i) absorption of food ____.

(ii) chewing of food ____.

(iii) killing of bacteria ____.

(iv) complete digestion of food ____.

(v) formation of faeces ____.


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Q10 :  

Write one similarity and one difference between the nutrition in Amoeba and human beings.


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Q11 :  

Label the following figure of the digestive system.

A part of human digestive system


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Q12 :  

Can we survive only on raw, leafy vegetables/grass? Discuss.


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<< Previous Chapter 1 : Nutrition in Plants Next Chapter 3 : Fibre to Fabric >>

Science : CBSE NCERT Exercise Solutions for Class 7th for Nutrition in Animals will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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