NCERT Solutions for Class 7 Science Chapter 2 - Nutrition in Animals

1. Fill in the blanks:

a). The main steps of digestion in humans are _______, _______, _______, _______ and _______.

Ans: ingestion, digestion, absorption, assimilation and egestion.

b). The largest gland in the human body is _______.

Ans: Liver.

c). The stomach releases hydrochloric acid and _______ juice which acts on food.

Ans: Gastric.

d). The Inner wall of the small intestine has many finger-like outgrowths called_______.

Ans: Villi.

e). Amoeba digests its food in the _______.

Ans: Food vacuole.

2. Mark ‘T’ if the Statement Is True and “F” if It Is False.

a). Digestion of starch starts in the stomach.

Ans: F

Digestion of starch starts from the mouth.

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

Ans: T

c). The gallbladder temporarily stores bile.

Ans: T

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

Ans: T

3. Tick () Mark the Correct Answers in Each of the Following:

a). Fat is completely digested in the 

1. Stomach 

2. mouth

3. Small intestine

4. large intestine.

Ans: (iii) Small intestine.

Fats are completely digested in the small intestine because it gets bile from the liver through the gallbladder which is responsible for fat digestion.

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

1. Stomach

2. mouth

3. Small intestine 

4. large intestine.

Ans: (iv) Large intestine.

As it takes several hours for the food to travel to enter the large intestine through the digestive tract, the water from the undigested food should be cleaned, this process takes place in the large intestine.

4. Match the Item of Column I With Those Given in Column II.

Ans:

The food components we take contain carbohydrates, proteins, and fats, which are then broken down by the digestive system into digestible ones such as sugar, amino acids, and fatty acids, glycerol respectively.

5. What are villi? What are their location and function?

Ans:

1. The finger-like projections present in the inner wall of the small intestine are called villi.

2. Villi serves the function of increasing the surface area of the small intestine for absorption of digested food. 

6. Where is the Bile produced? Which component of the food does it digest?

Ans:

1. Bile is produced by the liver. The gallbladder is where it is stored temporarily.

2. Fat is the component of food that is digested by bile juices.

7. Name the carbohydrate that can be digested by ruminants but not human beings. Give reason also.

Ans: Cellulose can be digested by ruminants but not by human beings. Because ruminants have a large sac-like structure called rumen between the esophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humans.

8. Why do we get instant energy from glucose?

Ans: Glucose is the simplest carbohydrate that undergoes oxidation and   can be broken easily to give a high energy molecule that provides energy for cells and the bloodstream by which we get instant energy 

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

• Absorption of food ------------. 

• Chewing of food -------------. 

• Killing of Bacteria ---------- 

• Complete digestion of food -----------. 

• Formation of feces -----------. 

Ans: 

• small intestine 

• buccal cavity 

• stomach 

• small intestine 

• large intestine 

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

Ans: Similarity: Both humans and amoeba require food for the cellular processes. Difference: Amoeba takes food by pseudopodia and digests it in there while humans eat food which gets digested at different parts of the digestive tract. 

11. Match the items of Column I With Suitable Items in Column II.

Ans:

12. Label fig. 2.2 of the Digestive System. 

Ans:

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

Ans:

1. No, we cannot survive only on raw, leafy vegetables/grass, because to live a healthy life we should have a balanced diet with all the nutrients.

2. Raw vegetables and grasses only provide fibers that are not enough for the body. So, these green leafy vegetables will not serve the purpose.

Class 7 Chapter 2 Science Quick Overview of Detailed Structure of Topics Covered

• Different Ways of Taking Food

• Digestion in Humans

• The Mouth and Buccal Cavity

• The Foodpipe/Oesophagus

• The Stomach

• The Small Intestine

• Large Intestine 

• Digestion in Grass-Eating Animals

• Feeding and Digestion in Amoeba

Nutrition in Animals Class 7 Science- Important Points

• Animal nutrition encompasses nutrient requirements, food consumption methods, and food usage in the body.

• The gastrointestinal tract and secretory glands make up the human digestive system.

• The salivary glands, the liver, and the pancreas are the parts of the glandular system that secrete digestive juices.

• Digestive enzymes are also produced by the stomach and intestinal tract walls.

• Carbohydrate digestion, such as starch digestion, begins in the buccal cavity.

• Protein digestion begins in the stomach.

• Bile, pancreatic juice, and digestive juice are used in the small intestine to digest all ingested elements.

• The small intestine absorbs the digested food through the blood vessels.

• The large intestine absorbs water and salts from the undigested material.

• Through the anus, the unabsorbed leftovers are ejected from the body as faeces.

• Ruminants are grazing animals such as cows, buffaloes, and deer.

• They quickly ingest and retain their green diet in the rumen. The meal eventually returns to the animal's mouth, where it is chewed.

• The amoeba ingests the food using its false feet, or pseudopodia. The food vacuole is where the food is processed.

Benefits of Vedantu’s NCERT Solutions for Class 7 Science Chapter 2 Question Answer PDF

• Vedantu’s Class 7 Science Chapter 2 PDF solutions offer comprehensive explanations of key concepts such as digestion, absorption, and assimilation, providing a thorough understanding of how animals obtain and use nutrients.

• Nutrition In Animals Class 7 Questions And Answers provides detailed and step-by-step answers to help clarify complex processes involved in the animal digestive system, enhancing comprehension and retention.

• Class 7 Science Chapter 2 Question Answer includes diagrams and illustrations that make learning about different digestive organs and their functions more visual and easier to grasp.

• Class 7th Science Chapter 2 Solutions are aligned with the NCERT textbook, ensuring they cover all topics in the syllabus and follow the CBSE curriculum.

• Nutrition In Animals Class 7 Questions And Answers are prepared to help students in exam preparation by providing practice questions and answers, helping students to be well-prepared for their assessments.

• Vedantu also offers additional study materials such as class notes, important concepts, and exemplar solutions to reinforce learning and ensure a solid grasp of the subject matter.

Using Vedantu’s Science Chapter 2 Class 7 PDF can significantly enhance your understanding of animal nutrition and improve your performance in exams.

Related Study Materials for Class 7 Science Chapter 2

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Conclusion

Vedantu’s Nutrition In Animals Class 7 Questions And Answers is an excellent resource for students aiming to understand this essential topic. Class 7 Chapter 2, Science Solutions, provides clear explanations and focuses on important concepts like the digestive system, nutrition processes, and types of nutrients. Science Class 7 Chapter 2 Question Answer helps students understand how animals obtain and use food. For exam preparation, it’s important to concentrate on key topics and practice thoroughly. Using Vedantu's Science Class 7 Chapter 2 Question Answer PDF will help students grasp the material better and improve their performance in exams.

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