NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals

Here we have given NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals.

Board	CBSE
Textbook	NCERT
Class	Class 7
Subject	Science
Chapter	Chapter 2
Chapter Name	Nutrition in Animals
Number of Questions Solved	12
Category	NCERT Solutions

NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals

Question 1.
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 …………. .
Solution:
(a) ingestion,  digestion, absorption, assimilation and egestion.
(b) liver
(c) digestive
(d) villi
(e) food vacuole.

Question 2.
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)
Solution:
(a) F
(b) T
(c) T
(d) T

Question 3.
Tick (✔) mark the Correct answer in each of the following :
(a)
Fat is completely digested in the

1.  stomach
2.  mouth
3.  small intestine
4. large intestine

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

1. stomach
2.  foodpipe
3.  small intestine
4.  large intestine

Solution:
(a)-3 small intestine
(b)-4 large intestine

Question 4.
Match the items of Column I with those given in Column n :
Solution:

Column I	Column II
Food components	Product(s) of digestion
Carbohydrates	Fatty acids and glycerol
Proteins	Sugar
Fats	Amino acids

Column I	Column II
Carbohydrates	Sugar
Proteins	Amino acids
Fats	Fatty acids and glycerol

 Question 5.
What are villi? What is their location and function?
Solution:

The inner walls of the small intestine have thousands of finger-like outgrowths. These are called villi. Villi are located in the small intestine. The villi increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials.

Question 6.
Where is the bile produced? Which component of the food does it help to digest?
Solution:
Bile is produced by liver and is stored in gall bladder. Bile juice digests fat.

Question 7.
Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
Solution:
Cellulose is a type of carbohydrate that can be digested by ruminants but not by humans. Ruminants have a large sac-like structure called rumen which is present in between the small intestine and large intestine. The cellulose is digested here by the action of certain bacteria which are not present in humans.

Question 8.
Why do we get instant energy from glucose?
Solution:
Glucose is the simplest form of carbohydrate which can be broken down easily to give energy. So, glucose is called instant energizer.

Question 9.
Which part of the digestive canal is involved in :

1.  absorption of food  …………. .
2. chewing of food …………. .
3.  killing of bacteria …………. .
4.  complete digestion of food …………. .
5. formation of faeces …………. .

Solution:

1.  small intestine
2.  buccal cavity
3.  stomach
4.  small intestine
5.  large intestine

Question 10.
Write one similarity and one difference between the nutrition in amoeba and human beings.
Solution:

1. Similarity :
   Both amoeba and human use digestive juices to digest food.
2. Difference :
   Human needs to chew food, whereas in amoeba, there is no chewing.

Question 11.
Match the items of Column I with suitable items in Column II :
Column I 
(a) Salivary gland
(b) Stomach
(c) Liver
(d) Rectum
(e) Small intestine
(f) Large intestine

Column II
(i) Bile juice secretion
(ii) Storage of undigested food
(iii) Saliva secretion
(iv) Acid release
(v) Digestion is completed
(vi) Absorption of water
(vii) Release of faeces
Solution:
(a)-(iii)
(b)-(iv)
(c)-(i)
(d)-(ii)-(vii)
(e)-(v)
(f)-(vi)

Question 12.
Label of the digestive system (as given in the NCERT Textbook Exercise)
Solution:

Question 13.

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

Solution:

No. Because to live a healthy life, we need a complete balance of all nutrients. Raw leafy vegetables/grass may have cellulose which can not be digested by us. So, we cannot survive only on raw, leafy vegetables/grafs.

NCERT Solutions for Class 7 Science

•     Chapter 1 Nutrition in Plants
•     Chapter 2 Nutrition in Animals
•     Chapter 3 Fibre to Fabric
•     Chapter 4 Heat
•     Chapter 5 Acids, Bases and Salts
•     Chapter 6 Physical and Chemical Changes
•     Chapter 7 Weather, Climate and Adaptations of Animals to Climate
•     Chapter 8 Winds, Storms and Cyclones
•     Chapter 9 Soil
•     Chapter 10 Respiration in Organisms
•     Chapter 11 Transportation in Animals and Plants
•     Chapter 12 Reproduction in Plants
•     Chapter 13 Motion and Time
•     Chapter 14 Electric Current and its Effects
•     Chapter 15 Light
•     Chapter 16 Water A Precious Resource
•     Chapter 17 Forests: Our Lifeline
•     Chapter 18 Wastewater Story

We hope the NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants help you. If you have any query regarding NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants, drop a comment below and we will get back to you at the earliest. Don't forget to check out the other solutions as well.