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Nutrition in Animals
Why do we get instant energy from glucose?
Glucose is a simple sugar. Carbohydrates, when consumed, have to be digested into glucose. As glucose can be easily absorbed in blood, it provides energy to the body. Hence, when glucose is directly taken, it does not have to be digested and thus acts as an instant source of energy.
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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 some time. (T/F)
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 |
What are villi? What is their location and function?
Where is the bile produced? Which component of the food does it help to digest?
Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
Why do we get instant energy from glucose?
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 ____.
Write one similarity and one difference between the nutrition in Amoeba and human beings.
Match the items of Column I with suitable items in Column II
|
- |
Column I |
- |
Column II |
|
(a) |
Salivary gland |
(i) |
Bile juice secretion |
|
(b) |
Stomach |
(ii) |
Storage of undigested food |
|
(c) |
Liver |
(iii) |
Saliva secretion |
|
(d) |
Rectum |
(iv) |
Acid release |
|
(e) |
Small intestine |
(v) |
Digestion is completed |
|
(f) |
Large intestine |
(vi) |
Absorption of water |
|
- |
- |
(vii) |
Release of faeces |
Label the following figure of the digestive system.
A part of human digestive system
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