Question

Multiple choice questions:
1.The organisms which can make their own food are called
a) heterotrophs b) autotrophs
c) parasites d) saprophytes

2. Which of these is not a part of nutrition?
a) digestion b) absorption
c) egestion d) excretion

3. The mechanical digestion of food starts in
a) oesophagus b) mouth
c) large intestine d) stomach

4. The pipe which connects the mouth with the stomach is
a) epiglottis b) oesophagus
c) intestine d) pharynx

5. What carries nutrients from digested food to all parts of the body?
a) blood b) mucous c) bile d) saliva

6. In humans, the type of teeth used to tear the food is
a) molar b) premolar
c) incisor d) canine

7. The greatest amount of digestion takes place in the
a)mouth b) stomach
c) small intestine d) large intestine

8. During digestion ,fats are changed into
a) amino acids b) fatty acids and glycerol
c) sugar d) glucose

9. Bile is produced in the
a)mouth b) stomach
c) small intestine d) liver

10. Which of these swallow food whole?
a) ant b) snake
c) deer d) cow
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Answer the following:
11. Define the following terms:
i) Ingestion ii) Digestion iii) Assimilation iv) Absorption
12. Name the organs that make up the human alimentary canal.
13. What is saliva and where is it produced?
14.Fill in the blanks:
i) The white hard substance that covers the teeth is called ____________.
ii) The semi-digested food that is chewed again by ruminants is called ______.
iii) The place of completion of digestion is ______.
iv) Absorption of water and release of faeces takes place in ________.
v) The digestive juices contain enzymes called ___________.
15.Name the following
i)Bony structure that grinds and cuts the food.
ii)Special substances that are present in the food.
iii)Largest gland of our body.

16.Practice the following diagrams
i) Nutrition in Amoeba ii) Hydra capturing food iii) Types of teeth in human beings iv)Human digestive system v) Digestion in ruminants
17. Briefly explain the process of digestion in ruminants.
18. What is saliva and how is it produced?
19. What is peristalsis? Explain with the help of a diagram.
20. Write short notes on
i) Nutrition in amoeba ii)Nutrition in hydra

Answer 1

Answer:

1 b) autotrophs

2 d) excretion

3 b) mouth

4 b) oesophagus

5 a) blood

6 d) canine

7 c) small intestine

8 b) fatty acid and glycerol

9 d) liver

10 b) snake

Explanation:

Answer 2

Answer:

1.autotroph

2. excretion

3.mouth

4.oseophagus

5.blood

6.canine

7.small intestine

8.fatty acid and glycerol

9.liver

10.snake

11.i)the act of swallowing or ingesting food material so that it passes to the body of an organism is called ingestion.

ii)the process by which the ingested food material is made soluble and assimilable by the action of enzymes in the body of the organism is called digestion.

iii) the process by which the components of food are taken to each and every cell of the body after the food has been digested and absorbed is called assimilation.

iv)the process of conversion of digested food into substance that can be absorbed and assimilated by the organism is called absorption.

12.mouth,buccal cavity, pharynx, oesophagus,stomach, small intestine,large intestine,anus.

13.saliva is a slightly alkaline fluid containing water,salt,mucus and enzymes such as salivary amylase and lysosome.it is secreted in buccal cavity.

14.i)enamel

ii)chyme

iii)small intestine

iv)large intestine

15.i) teeth

ii) nutrients

iii)liver