NCERT Class VII Science Solutions: Chapter 2-Nutrition in Animals Part 1

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Question 1:

Fill in the blanks:

  1. The main steps of nutrition in humans are __________, __________, __________, _________ and __________.

  2. The largest gland in the human body is __________.

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

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

  5. Amoeba digests its food in the ____________.

Answer:

  1. The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion.

  2. The largest gland in the human body is liver.

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

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

  5. Amoeba digests its food in the food vacuole.

Question 2:

Mark (T) if the statement is true and (F) if it is false:

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

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

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

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

Answer:

  1. Digestion of starch starts in the stomach. (False)

  2. The tongue helps in mixing food with saliva. (True)

  3. The gall bladder temporarily stores bile. (True)

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

Question 3:

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

  1. Fat is completely digested in the

    1. stomach

    2. mouth

    3. small intestine

    4. large intestine

  2. Water from the undigested food is absorbed mainly in the

  3. stomach

  4. food pipe

  5. small intestine

  6. large intestine

Answer:

Fat is completely digested in the (C) small intestine (True)

Image shows small intestine absorbs digested food

Small Intestine

Image shows small intestine absorbs digested food

Water from the undigested food is absorbed mainly in the (D) large intestine (True)

This image shows the large intestine

The Large Intestine

This image shows the large intestine

Question 4:

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

Difference between Food Components and Product of Digestion (Q)
Difference between Food components and product of digestion (Q)

Column I

Column II

Food components

Product(s) of digestion

Carbohydrates

Fatty acids and glycerol

Proteins

Sugar

Fats

Amino acids

Answer:

Difference between Food Components and Product of Digestion
Difference between Food components and product of digestion

Column I

Column II

Food components

Product(s) of digestion

Carbohydrates

Sugar

Proteins

Amino acids

Fats

Fatty acids and glycerol