NCERT Solutions for Class 7 Science Chapter 2 – Nutrition in Animals
Subject specialists have designed NCERT solutions for Science Class 7 Chapter 2 which includes thorough solutions for reference. These solutions are updated according to the latest CBSE syllabus for 2012-22 and are provided in easy language for understanding. Tips and tricks are also provided.
These solutions are provided so a student can clear his doubts and get help with deep understanding of the concept. Also you can refer them to make the chapter notes and revisions notes. PDF of this can also be downloaded from website.
CHAPTER 2_NUTRITION IN ANIMALS NCERT SOLUTIONS
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_____________.
A. a) ingestion, digestion, absorption, assimilation and egestion
b) liver c) digestive d) villi e) food vacuole
2. Mark ‘T’ if the statement is true and ‘F’ if it is false:
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 sometime. ( T )
3. Tick (√) mark the correct answer in each of the following:
a. Fat is completely digested inthe :
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 (√)
4. Match the items of Column I with those given in Column II:
Column I Column II
Food components Product(s) of digestion
1) Carbohydrates ( ) A) Fatty acids and glycerol
2) Proteins ( ) B) Sugar
3) Fats ( ) C) Amino acids
A. 1) B 2) C 3) A
5. What are villi ?Write their location and function.
A. i) Tiny finger-like projections originating from the walls of the small intestine are called villi.
ii) Villi are located on the inner walls of small intestine.
iii) They increase the surface area for absorption of the digested food.
iv) The blood vessels present inside the villi absorbs the nutrients from the digested
6. Where is the bileproduced ?Which component of the food does it help to digest ?
A. i) Bile is produced in the liver.
ii) It plays an important role in the digestion of fats.
7.Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
A. i) Cellulose is a type of carbohydrate that can be digested by ruminants and not by humans.
ii) Ruminants have a large sac-like structure called caecum in their digestive system where the food containing cellulose is digested by the action of certain bacteria.
iii) Humans cannot digest cellulose, as the cellulose digesting enzymes are absent in them.
8. Why do we get instant energy from glucose ?
A. i) Glucose is a simple sugar and can be easily absorbed into the blood to produce energy.
ii) Hence, glucose acts as an instant source of energy.
9. Which part of the digestive canal is involvedin :
i) absorption of food ii) chewing of food
iii) killing of bacteria iv) complete digestion of food
v) formation of faeces
A. i) small intestine ii) buccal cavity iii) stomach
iv) small intestine v) large intestine
10. Write one similarity and one difference between the nutrition in Amoeba and human beings.
A. The mode of nutrition in both Amoeba and human beings is Heterotrophic mode of nutrition.
Differences between nutrition in Amoeba and human beings:
i) Digestion of carbohydrates, proteins, and fats starts in separate regions in human
ii) In Amoeba all the food components are digested in the food vacuole.
11. Match the items of Column I with suitable items in Column II
Column I Column II
1) Salivary gland ( ) A) Bile juice secretion
2) Stomach ( ) B) Storage of undigested food
3) Liver ( ) C) Saliva secretion
4) Rectum ( ) D) Acid release
5) Small intestine ( ) E) Digestion is completed
6) Large intestine ( ) F) Absorption of water
G) Release of faeces
A. 1) C 2) D 3) A 4) B 5) E 6) F
12. Label the following figure of the digestive system.
A.
13. Can we survive only on raw, leafy vegetables /grass ?Discuss.
A. i) No, humans cannot survive only on raw, leafy vegetables or grass.
ii) It is because these are rich in cellulose, which cannot be digested due to the absence of cellulose digesting enzymes in our digestive system.
Important topics covered in these NCERT Solutions
- Ways of food intake
- Humans digestion
- Digestion in herbivores
- Nutrition and digestion in Amoeba
Class 7 Science NCERT Solutions Chapter 2 – Nutrition in Animals
These NCERT Solutions are designed in such a way that students learn and practice questions related to animal nutrition. After that, this chapter cover important topics like nutrition and digestion in humans and animals as well as in simple organisms, the process of nutrition, digestive system, etc. The NCERT Solutions of this chapter also includes different examples and solved exercises that students must go through and use to prepare for exams.
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Frequently Asked Questions on NCERT Solutions of this Chapter
Explain the location and function of villi from these NCERT Solutions.
The finger-like projections or outgrowth present in the small intestine of human’s digestive system are called villi. The surface area for food absorptions and digestive secretions are increased with the help of villi. For understanding this concept clearly, diagrams are present in the solutions for visual learning. Students facing difficulty to answer the questions can use these solutions from Infinite Learn to get help in the concepts. The solutions are very helpful for the students to analyse the weal areas and can work on it for fetching good grades.
In Chapter 2 of NCERT Solutions for Class 7 Science, which component of food does the bile help to digest?
The liver produces bile juice which helps in the digestion of fats by breaking large fat globules into smaller ones. The NCERT Solutions at Infinite solution present a PDF in a chapter-wise format which can be utilize by the students to get their doubts clear. Each and every chapter is well explained in a simple manner to help students with the best learning experience. The solutions make students to understand these concepts in a best way possible and appear for the exam with better confidence. Pictorial representations of some concepts are shown to help students fetch good grades in the exams.
What are the key features of these NCERT Solutions?
The key features of this Chapter are –
- NCERT Solutions helps in providing fully resolved step by step solutions to all textbook questions.
- Set of solutions which comes with a list of all important concepts.
- These solutions are made accordance to the latest syllabus.
- Solutions are prepared by subject matter experts.
- NCERT Solutions provides help for the preparation of final exams.
