Science - Chapter 2 - Nutrition in Animals
Class - 7
NCERT - Important Questions
Very Short Answer Type Questions
Question 1. Do all animals have the same mode of nutrition?
Answer: No
Question 2. Name the mode of nutrition in which solid whole food particles is ingested.
Answer:
Holozoic
Question 3. What is the organ that stores bile?
Answer: Gall bladder
Question 4. Which part of the digestive canal is involved in killing
bacteria?
Answer: Stomach
Question 5. Name the part of digestive canal involved in chewing of
food.
Answer: Mouth
Question 6. Where are fats digested in the body?
Answer: Fats are mainly digested in the small intestine.
Question 7. Where is the water from undigested food absorbed in the
body?
Answer: Water from undigested food is absorbed in the body
in large intestine.
Question 8. What kills bacteria that enter along with the juices to
act?
Answer: The acid kills many bacteria that enter along with
the juices to act.
Question 9. Where food is completely digested?
Answer: The food is completely digested in the small
intestine.
Question 10. Where are faeces formed in the human body?
Answer: Faeces are formed in the human body in large
intestine.
Question 11. Which glands secrete saliva?
Answer: Salivary glands secrete saliva.
Question 12. Where food is absorbed in our body?
Answer: Absorption of food takes place in small intestine.
Question 13. Which gland in our body secretes bile?
Answer: Bile is a digestive juice that is secreted by the
liver.
Question 14. Where faeces are stored?
Answer: Faeces are stored in rectum.
Question 15. What are the end products of carbohydrate?
Answer: The carbohydrates get broken into simple sugars such
as glucose.
Question 16. Name the end products of fats.
Answer: Fatty acids and Glycerol
Question 17. Write the end products of proteins.
Answer: Amino acids
Question 18. What causes diarrhoea in human beings?
Answer: it may be caused by an infection, food poisoning or
indigestion.
Question 19. Which is the largest gland in the human body?
Answer: Liver is the largest gland in human body.
Question 20. What is ingestion?
Answer: The process of taking food into the body is called
ingestion.
Question 21. What are the different types of teeth?
Answer: We have different types of teeth: incisor, canine,
premolar and molar.
Question 22. What does saliva do to food in our mouth?
Answer: The saliva breaks down the starch into sugars.
Question 23. How does food pass from the mouth to the stomach?
Answer: Food is pushed down by movement of the wall of the
food pipe.
Question 24. What is rumen?
Answer: Ruminants have a large sac-like structure called
rumen.
Question 25. How does an amoeba move?
Answer: Amoeba use pseudopodia (false feet) to move.
Question 26. What is the finger like projections present in the inner
wall of the small intestine?
Answer: Villi
Question 27. Which organ expelled out the undigested and unabsorbed
residues from human body?
Answer: Anus
Question 28. What are permanent teeth?
Answer: The second set that replaces a temporary milk teeth
are the permanent teeth
Question 29: Name two animals that live on liquid food only.
Answer: Animals that
live only on liquid food include housefly and mosquito.
Question 30: Which of these is not a part of nutrition?
(a) digestion (b) absorption (c) egestion (d)
excretion
Answer: (d) excretion Ingestion, digestion, absorption,
assimilation and egestion are the five steps of nutrition. Excretion is not a
part of nutrition.
Question 31: The pointed teeth in your mouth are - ----
Answer: canines
The pointed teeth in our mouth are called canines.
They help us in piercing and tearing the food.
Question 32: The last part of digestion of food takes place in the
Answer: small intestine
The last step of digestion of food takes place in the
small intestine.
Question 33: What is the name given to the process by which absorbed
nutrients are utilized by the body?
Answer: Assimilation is the process through which absorbed
nutrients are utilized by the body.
Question 34: Name the cavity in unicellular
animals in which food in present.
Answer: In unicellular animals, food is present in the
cavity called food vacuole.
Question 35: Digestion begins in the stomach. True of false?
Answer: It is a false statement, as the digestion of food
begins in the mouth.
Question 36 -Saliva helps by making the food wet. It does not have
any other function. True or false?
Answer: False, saliva not just makes the food wet but also
breaks down the starch into sugar which is easier to digest.
Question 37: Where does initial digestion of proteins take place?
Answer: The initial digestion of proteins
takes place in the stomach.
Question 38: The white hard substance that covers the teeth is called
Answer: enamel
Question 39: In which part of the digestive system is water absorbed
from undigested food?
Answer- Most of the water from the undigested food is
absorbed in the large intestine.
Question 40: The semi-digested food that is chewed again by ruminants
is called -------
Answer: cud
Question 41: Name the organs that make up the human alimentary canal.
Answer: Organs that make up the human alimentary canal are
mouth, pharynx, oesophagus, stomach, small intestine, large intestine and anus.
Question 42: What is the function of taste buds?
Answer: The function of taste buds is to detect the various
tastes like sweetness, saltiness, sourness and bitterness of food.
Question 43: How does the presence of acid in the stomach help?
Answer: The acid in the stomach helps in digesting proteins.
It also kills the bacteria that enter the stomach through food.
Question 44: Bile is produced in the ----------
Answer: Bile is a
digestive juice which is produced in the liver.
Question 45: The greatest amount of digestion of food in humans takes
place in the ----
Answer: Mostly, the digestion of food takes place in our
small intestine.
Question 46: Breaking down of
food into simple soluble compounds is called --------
Answer: Through the process of digestion, food is broken
down into simple soluble compounds.
Question 47: During digestion, fats are changed into
Answer: During
digestion, fats are converted to fatty acids and glycerol.
Question 48: Which of the following organs does not secrete digestive
juices?
(a) stomach (b)
small intestine (c) liver (d) oesophagus
Answer: (d)
oesophagus
Oesophagus does not secrete any digestive juice. The
stomach, small intestine and liver secrete digestive juices.
Question 49: How long does food stay in the stomach?
Answer: Food can stay in the stomach from a few minutes to a
few hours, depending on its type. Solid food stays in the stomach for 4-5
hours, but liquid food remains only for a few minutes.
Question 50: What kind of teeth do you think are especially developed
in carnivores?
Answer: canines
Answer: Liver
Question 52- Define
digestion.
Answer: The process of breakdown of complex substances of
food into simpler form is called digestion.
Question 53- Name the
parts of alimentary canal.
Answer: Buckle cavity, oesophagus, stomach, small intestine,
large intestine, rectum and anus.
Question 54- Name the
glands that secrete digestive juice.
Answer: Salivary gland, pancreas and liver
Question 55- The process
of taking food into the body is called------
Answer: Ingestion
Question 56- We chew food
with ___ and break it mechanically into small pieces.
Answer: Teeth
Question 57- Name the
different types of teeth.
Answer: Incisor, canine, premolar and molar
Question 58- The saliva
breakdown starch into sugars.True/ False.
Answer: True
Question 59- Kids of three
years age have____ teeth.
Answer: Milk
Question 60- Name the type
of food of ant
Answer: Ant: sugar, food particles
Question 61- Name the type
of food of mosquitoes .
Answer: Mosquita: blood
Question 62- Name the mode
of feeding of ant and mosquitoes.
Answer: The mode of feeding of ant: scraping and the mode of
feeding of mosquitoes: sucking.
Question 63- Amoeba
digests its food in the------
Answer: Food vacuole.
Question 64- The tongue
helps in mixing food with the saliva. True/ False.
Answer: True.
Question 65- Name
ruminants.
Answer: Grazing animals like: Cow, buffaloes and deer.
Question 66- Name the
finger like projection present in the inner wall of the small intestine
Answer: Villi
Question 67- Name the
organ responsible for removal of undigested and unabsorbed residues from human
body.
Answer: Anus
Question 68- Bile juice is
stored in a sac called------------
Answer: Gall bladder
Question 69- What is the
location of pancreas?
Answer: Pancreas is located just below the stomach.
Question 70- Name the end
products of carbohydrates.
Answer: Simple sugars such as glucose
Question 71. Name the end
products of fats.
Answer: Fatty acids
Question 72- Name the end
products of proteins.
Answer: Amino acids.
Question 73- Large
intestine receives digested and absorbed food. True/ False.
Answer: False
Question 74- Define
egestion.
Answer: The process of removal of faecal matter from the
body through the anus is
called egestion.
Question 75- What are the
causes of diarrhoea in human beings?
Answer: Infection, food poisoning or indigestion.
Question 76- What is the full form of ORS ?
Answer: Oral Rehydration Solution
Question 77- How food is pushed down from mouth to stomach?
Answer: Food is pushed down by movement of the wall of the
food pipe.
Question 78- Human can digest cellulose. True/False.
Answer: False.
Question 79- The digestion of cellulose takes place in______ present in all ruminants.
Answer: Rumen
Question 80- Amoeba uses___ for movement and capture of food.
Answer: Pseudopodia.
Question 81- Name the part of digestive canal involved in
absorption of food.
Answer: Small intestine
Question 82- Name the part of digestive canal involved in complete digestion of food.
Answer: Small intestine
Question 83- Name the part of digestive canal involved in killing
of bacteria.
Answer: Stomach
Question 84- Name the part of digestive canal involved in
formation of faeces.
Answer: Large intestine
Question 85- Name the part of digestive canal involved in chewing
of food.
Answer: Mouth
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