Nutrition in Animals


Why do we get instant energy from glucose?


Because it easily breaks down in the cell with the help of oxygen which provides instant energy to the organism. Glucose does not need digestion, it is directly absorbed into the blood.


Nutrition in Animals

Q 1.

Tick (S) mark the correct answer in each of the following:
(a) Fat is completely digested in the
(i) stomach (ii) mouth (in) 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

Q 2.

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

Q 3.

What are villi? What is their location and function?

Q 4.

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

Q 5.

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

Q 6.

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 ___________ .

Q 7.

Why do we get instant energy from glucose?

Q 8.

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 sometime. (T/F)

Q 9.

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

Q 10.

Q.4.Match the items of column I with those given in column II:

Q 11.

Match the items of Column I with suitable items in Column II.

Q 12.

Label Fig. 2.11 of the digestive system (as given in the NCERT Textbook Exercise)


Q 13.

Which part of the digestive canal is involved in:
(i) Absorption of food ________ .
(ii) Chewing of food ________ .
(iii) Killing of bacteria ________ .
(iv) Complete digestion of food ________ .
(v) Formation of faeces ________ .