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18 questions · timed · auto-graded

Question 11 Mark
Name the parts of the alimentary canal where
(a) water gets absorbed from undigested food
(b) digested food gets absorbed
(c) taste of the food is perceived
(d) bile juice is produced
Answer
(a) large intestine
(b) small intestine
(c) tongue
(d) liver
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Question 21 Mark
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?
Answer
Inspite of being blindfolded, one could identify two different drinks with the help of taste buds present in the tongue.
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Question 31 Mark
Which type of teeth are used for chewing and grinding?
Answer
For chewing and grinding we use premolars and molars.
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Question 41 Mark
Which type of teeth do you use for biting and cutting and which one for piercing and tearing?
Answer
For biting and cutting, we use incisors and for piercing and tearing we use canines.
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Question 61 Mark
You have studied in previous class that food consists of many components. Try to recall and list them.
Answer
1. Carbohydrates, 2. Proteins, 3. Fat, 4. Vitamins, 5. Minerals, 6. Roughage
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Question 71 Mark
What is rumination?
Answer
It is the process occurring in ruminants, e.g. cows and buffaloes. In this the animals bring back the food, which was already consumed, into the mouth and chew it again.
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Question 81 Mark
What is assimilation?
Answer
The process by which absorbed food is taken by body cells and is used for energy, growth and repair is called assimilation.
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Question 91 Mark
Name the simple forms of carbohydrates, fats and proteins.
Answer
The simple forms of carbohydrates are sugars, of fats are fatty acids and glycerol, and of proteins are amino acids.
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Question 101 Mark
Discuss the role of hydrochloric acid secreted by inner lining of stomach.
Answer
Hydrochloric acid creates an acidic environment, which facilitates the action of the digestive enzymes in the stomach. It also kills many bacteria that enter along with the food.
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Question 111 Mark
Name the secretions of stomach, that help to digest food.
Answer
The inner lining of stomach secretes hydrochloric acid and digestive juices.
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Question 121 Mark
Describe alimentary canal briefly.
Answer
Alimentary canal is the tube running from mouth to anus in animals including humans. Here, digestion and absorption of food take place.
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Question 131 Mark
Define digestion.
Answer
It is defined as the process of breakdown of complex substances of food into simpler ones.
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Question 141 Mark
Where is the bile produced? Which component of the food does it help to digest?
Answer
Bile juice is produced by the liver and stored in gall bladder. It helps in digestion of fats present in food.
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Question 151 Mark
What are villi? What is their location and function?
Answer
Villi are the finger-like projections in the inner walls of the small intestine. They increase the surface area for absorption of digested food.
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Question 161 Mark
Name a muscular organ, which helps in speaking.
Answer
The tongue is the muscular organ that helps in speaking.
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1 Marks Question - Science STD 7 Questions - Vidyadip