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Published on: 27/07/2018
Some of the important questions are prepared from this chapter Nutrition in Animals.
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Questions + Answers key
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1.
Fat is completely digested in the
stomach
mouth
small intestine
large intestine
2.
Water from the undigested food is absorbed mainly in the
stomach
foodpipe
small intestine
large intestine
3.
Which of the following pair of teeth differ in structure but are similar in function?
Canines and incisors
Molars and premolars
Incisors and molars
Premolars and canines
4.
The acid present in the stomach
kills the harmful bacteria that may enter along with the food
protects the stomach lining from harmful substances
digests starch into simpler sugars
makes the medium alkaline
5.
Cud is the name given to the food of ruminants which is
swallowed and undigested
swallowed and partially digested
properly chewed and partially digested
properly chewed and completely digested
6.
The tip or front of tongue taste
sour
bitter
salt and sweet
All of these
7.
Where is the bile produced? Which component of the food does it help to digest?
8.
Why do we get instant energy from glucose?
9.
Write one similarity and one difference between nutrition in Amoeba and human beings.
10.
Can we survive only on raw, leafy vegetables/grass? Discuss.
11.
Name the various components of food and their simpler forms.
12.
Discuss the various associated glands of digestive system and their role in digestion.
13.
The main steps of nutrition in humans are _____, _____, _____, ______ and _____
14.
The stomach releases hydrochloric acid and _____ juices which act on food.
15.
What is the total number of teeth in an adult human?
16.
You were blindfolded and asked to identify the drinks provided in two different glasses. You could identify drink A as lime juice and B as bitter gourd juice. How could you do it inspite of being blindfolded?
17.
We should not eat hurriedly. Give reason.
18.
Suggest the organ of digestive system where the digestive juices from liver and pancreas is poured.
19.
What is assimilation?
20.
Write the shape of stomach.
21.
Label the given figure as directed below in A to D and give the name of each type of teeth.
(a) The cutting and biting teeth as A
(b) The piercing and tearing teeth as B
(c) The grinding and chewing teeth as C
(d) The grinding teeth present only in adult as D.
22.
Label the following parts of above figure and name them.
(a) The largest gland in our body.
(b) The organ where protein digestion starts.
(c) The organ that releases digestive juice into the small intestine.
(d) The organ where bile juice gets stored.
23.
Ruminant can digest cellulose (carbohydrate).
24.
Canines are used for grinding of food.
1.
Small intestine is the site for complete digestion of fats by the action of bile juice
2.
Large intestine absorbs the water from undigested food.
3.
(b)
Molars and premolars
4.
(a)
kills the harmful bacteria that may enter along with the food
5.
(b)
swallowed and partially digested
6.
(c)
salt and sweet
7.
Bile juice is produced by the liver and stored in gall bladder. It helps in digestion of fats present in food.
8.
Glucose is a simple sugar or carbohydrate which is broken down in the presence of oxygen into CO2 and H2O and releases instant energy. Glucose is easily absorbed by the blood, hence provides instant energy to the body.
9.
Both Amoeba and humans require energy for the growth and maintenance of their bodies. This energy is derived from the food they eat. The food is in a complex form and is therefore broken down into simple forms by the process of digestion. Both these organisms are heterotrophs, i.e. they derive their food from other plants or animals.
Difference between nutrition in Amoeba and human beings are
| Digestion in human | Digestion in Amoeba |
| Humans have mouth and complex digestive system. |
Mouth and digestive system are absent in Amoeba. |
| Digestive juices are secreted in the buccal cavity, stomach and small intestine. |
Digestive juices are secreted in the food vacuole. |
| Digestion of carbohydrates, proteins and fats starts in separate regions. |
All the food components are digested in the food vacuole. |
10.
No, we connot survive only on raw, vegetables/grasses. This is due to the absence of cellulose degrading/digesting enzymes. Raw plants, vegetables and grasses, etc, contain chlorophyll, which is digested in ruminants by the action of microorganism but humans do not posses these microorganisms. Therefore, we would not be able to digest cellulose and meet our energy requirements.
11.
The various components of food and their simpler forms are
| Components of food | Simpler form |
| Carbohydrate | Glucose |
| Fats | Fatty acids and glycerol |
| Proteins | Amino acids |
| Vitamins | Vitamins |
| Minerals and water | Minerals and water |
12.
The various associated glands of digestive system and their role in digestion are as follows.
(i) Salivary gland digestion of starch in mouth.
(ii) Liver secretes bile juices which help in the digestion of fats.
(iii) Pancreas secretes pancreatic juices which act on carbohydrate, fats and proteins and change them into simpler compounds.
13.
( )
ingestion, digestion, absorption, assimilation and egestion
14.
( )
digestive
15.
In an adult human, there are total 32 teeth.
16.
Inspite of being blindfolded, one could identify two different drinks with the help of taste buds present in the tongue.
17.
We should not eat hurriedly because if we ingest food in hurry or we talk or laugh while eating we experience hiccups, coughing or choking sensation.
18.
The digestive juices from liver and pancreas is poured into small intestine which helps in complete digestion and absorption of food.
19.
The process by which absorbed food is taken by body cells and is used for energy, growth and repair is called assimilation.
20.
The shape of stomach is like flattened U-shaped.
21.
22.
23.
(a)
24.
(b)
7th Standard CBSE Syllabus & Materials
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