Nutrition in Animals - Class 7 - Science
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Back Questions - Nutrition in Animals | NCERT | Science | Class 7
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 _________.
(a) The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion.
(b) The largest gland in the human body is the liver.
(c) The stomach releases hydrochloric acid and digestive juices which act on food.
(d) The inner wall of the small intestine has many finger-like outgrowths called villi.
(e) Amoeba digests its food in the food vacuole.
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)
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Sign up nowFat is completely digested in the
(i) stomach
(ii) mouth
(iii) small intestine
(iv) large intestine
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Sign up nowWater from the undigested food is absorbed mainly in the
(i) stomach
(ii) foodpipe
(iii) small intestine
(iv) large intestine
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Sign up nowMatch 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 |
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Sign up nowWhat are villi? What is their location and function?
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Sign up nowWhere is the bile produced? Which component of the food does it help to digest?
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Sign up nowName the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
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Sign up nowWhy do we get instant energy from glucose?
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Sign up nowWhich 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
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Sign up nowWrite one similarity and one difference between the nutrition in amoeba and human beings.
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Sign up nowMatch 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 |
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Sign up nowCan we survive only on raw, leafy vegetables/grass? Discuss.
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Sign up nowExtra Questions - Nutrition in Animals | NCERT | Science | Class 7
What substances are secreted by the stomach lining, and what are their functions?
The stomach lining secretes mucous, hydrochloric acid, and digestive juices. Mucous protects the lining of the stomach from being digested by its own acid and enzymes. Hydrochloric acid serves a dual purpose: It kills many bacteria that enter with the food, safeguarding the body against pathogens, and it creates an acidic environment that enables the digestive juices to function effectively. These digestive juices, primarily containing enzymes, are crucial for breaking down proteins into simpler substances that the body can more easily absorb and utilize for its various biological functions.
How does the rumination process in cows differ from the human digestion process?
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Sign up nowBased on what you've learned about the digestive system and nutrient absorption, discuss the importance of consuming a diet that includes a diverse range of food types.
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Sign up nowHow do digestive disorders like diarrhoea affect nutrient absorption?
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Sign up nowPet Supplies makes a profit of Rs. 5.50 per bag on its line of natural dog food. If the store wants to make a profit of no less than Rs. 5225, how many bags of dog food does it need to sell?
A) at most 950 bags
B) at least 950 bags
C) at most 475 bags
D) at least 475 bags
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