Revision of TOPIC NUTRITION

REVISION EXERCISE
NUTRITION

1. Give any two examples of autotrophic and heterotrophic nutrition.
2. Distinguish between parasitic and saprophytic mode of nutrition.
3. What is the need of digesting the food?
4. Where does the digestion process starts in your body?
5. Name one enzyme secreted by salivary glands as well as pancreas.
6. What is the name given to rhythmic wave like movements occurring in alimentary canal?
7. Mention any two reasons for which plants have low energy needs.
8. What is the function of HCl produced by the gastric glands of stomach?
9. Name the components of gastric juice. Mention their functions also.
10. Describe the mode of nutrition found in amoeba.
11. Blood sugar level of a normal person rises after taking a meal-.
i) Why does this happen?
ii) Which hormone regulates this increased level of blood sugar?
iii) Name the source gland of this hormone.


12. Prolonged chewing of food in mouth makes it sweet in taste. Why?
13. Trace the path of digestion of proteins in your body.
14. Where the protein digesting enzyme 'pepsin' is released and why it doesn’t act on stomach's wall?
15. Specify the site of action of pancreatic juice and bile juice.
16. In which form carbohydrates are absorbed in our body?
17. Name one protein digesting enzyme that work in basic pH.
18. What protects us from the germs that manage to enter in our body along with food?
19. Food always moves down even if a person is lying down on the floor. Why?
20. Which gland has a significant role in the digestion of fats present in food? Explain.
21. Rate of breathing in aquatic organisms is faster than terrestrial organisms. Give reason.
22. In the given diagram:


a) a vestigial organ associated with it.
b) Site of action of bile juice & pancreatic juice
c) site of absorption of water.
d) Gland associated with digestion of fat
e) site of absorption of digested food
f)Gland producing digestive enzyme and hormone as well.
g) Specify the site where the secretion of bile juice is stored temporarily
23. Specify the function of gall bladder.
24. ‘Liver does not produce any digestive enzymes but still it has a significant role in digestion.’ Justify.