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Published on: 31/10/2025
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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.
Hydrochloric acid is secreted by
linings of small intestine
inner lining of stomach
pancreas
lining of liver
4.
Saliva converts starch into:
Fats
Sugar
proteins
Minerals
5.
Which one of the following is not secreted by the walls of stomach?
hydrochloric acid
Mucous
Digestive juice
Bile juice
6.
What are villi? What is their location and function?
7.
Where is the bile produced? Which component of the food does it help to digest?
8.
Write various components of food.
9.
Amoeba digests its food in the ______
10.
_____ is the process of taking food inside the body.
11.
_____ is the simplest form of carbohydrate.
12.
Glucose is the simplest form of ...........
13.
The breakdown of complex components of food into simpler substances is called ..............
14.
Stomach
15.
Liver
16.
Rectum
17.
Animals
18.
House fly
19.
Identify the location of salivary gland.
20.
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?
21.
We should not eat hurriedly. Give reason.
22.
What is large intestine? Write its function.
23.
What do you understand by rumen?
24.
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.
25.
How do ruminants digest the cellulose?
26.
Simplest form of fat is sugars and glucose.
27.
Ruminant can digest cellulose (carbohydrate).
28.
The large intestine is longer and wider than the small intestine of the human alimentary canal.
29.
Mucus protects the stomach lining from damage.
30.
All heterotrophs have a similar basic process of nutrition.
31.
Which ones for piercing and tearing?
32.
Which one for chewing and grinding?
33.
Name the two components of food.
34.
Name the two parts of digestive system.
35.
What is Bile?
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)
inner lining of stomach
4.
(b)
Sugar
5.
(b)
Mucous
6.
Villi are the finger-like projections in the inner walls of the small intestine.
Function Villi increases the surface area for absorption of digested food.
7.
Bile juice is produced by the liver and stored in gall bladder. It helps in digestion of fats present in food.
8.
The various components of food are as following:
(i) Carbohydrates
(ii) Fats
(iii) Proteins
(iv) Vitamins
(v)Minerals
(vi) Water and Roughage
9.
( )
food vacuole
10.
( )
Ingestion
11.
( )
Glucose
12.
carbohydrates
13.
( )
digestion
14.
( )
Acid release
15.
( )
Bile juice secretion
16.
( )
Release of faeces
17.
( )
Heterotrophs
18.
( )
Sponging
19.
Salivary gland is present in the buccal cavity and it secretes saliva.
20.
Inspite of being blindfolded, one could identify two different drinks with the help of taste buds present in the tongue.
21.
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.
22.
Large intestine is the part of a alimentary canal which is wider and shorter than small intestine. Its main function is to absorb water and some salts from the undigested food. It also helps in the egestion of undigested food.
23.
The grass eating animals quickly swallow the grass and store it in a separate part of the stomach. This part is called rumen.
24.
25.
The food of ruminants like grass is rich in cellulose (a type of carbohydrate). Ruminants have a large sac-like structure between the small intestine and large intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humans. In this way ruminants can digest the cellulose but many animals including human can not digest cellulose.
26.
(b)
27.
(a)
28.
(b)
29.
(a)
30.
(a)
31.
( )
Canine
32.
( )
Premolars and molars
33.
( )
Carbohydrates and fat.
34.
( )
Digestive track and associated glands.
35.
( )
Bileis a secretion secreted by liver.
7th Standard CBSE Syllabus & Materials
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