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NCERT solutions Science Textbook for Class 7 chapter 2 Nutrition in Animals

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Chapter 2 - Nutrition in Animals

Pages 20 - 22

Fill in the blanks:

The main steps of nutrition in humans are  _______________________________

__________and __________

Q 1.1 | Page 20 | view solution

Fill in the blanks:

The largest gland in the human body is __________

Q 1.2 | Page 20 | view solution

Fill in the blanks:

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

Q 1.3 | Page 20 | view solution

Fill in the blanks:

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

Q 1.4 | Page 20 | view solution

Fill in the blanks:

Amoeba digests its food in the __________.

Q 1.5 | Page 20 | view solution

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

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

Q 2.1 | Page 20 | view solution

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

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

Q 2.2 | Page 20 | view solution

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

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

Q 2.3 | Page 20 | view solution

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

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

Q 2.4 | Page 20 | view solution

Tick ( √) mark the correct answer in each of the following:

Fat is completely digested in the

(1) stomach

(2) mouth

(3) small intestine

(4) large intestine

Q 3.1 | Page 20 | view solution

Tick ( √) mark the correct answer of the following:

Water from the undigested food is absorbed mainly in the

(1) stomach

(2) food pipe

(3) small intestine

(4) large intestine

Q 3.2 | Page 20 | view solution

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
Q 4 | Page 21 | view solution

What are villi? What is their location and function?

Q 5 | Page 21 | view solution

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

Q 6 | Page 21 | view solution

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

Q 7 | Page 21 | view solution

Why do we get instant energy from glucose?

Q 8 | Page 21 | view solution

Which part of the digestive canal is involved in absorption of food ____

Q 9.1 | Page 21 | view solution

Which part of the digestive canal is involved in chewing of food ____

Q 9.2 | Page 21 | view solution

Which part of the digestive canal is involved in: killing of bacteria ____.

Q 9.3 | Page 21 | view solution

Which part of the digestive canal is involved in:complete digestion of food ____

Q 9.4 | Page 21 | view solution

Which part of the digestive canal is involved in: formation of faeces ____.

Q 9.5 | Page 21 | view solution

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

Q 10 | Page 21 | view solution

Match the items of Column with suitable items in Column II

Column I Column II
Salivary gland Bile juice secretion
Stomach Storage of undigested food
Liver Saliva secretion
Rectum Acid release
Small intestine Digestion is completed
Large intestine Absorption of water
  Release of faeces
Q 11 | Page 21 | view solution

Label the following figure of the digestive system.

A part of human digestive system

Q 12 | Page 22 | view solution

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

Q 13 | Page 22 | view solution

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