REVISION OF TOPIC RESPIRATION

RESPIRATION

1. How anaerobic respiration is different from aerobic respiration?
2. Explain the mechanism of breathing in human beings.
3. Explain why:
a). When air is taken in and out during breathing, the lungs always contain a residual volume of air.
b). Herbivores need a longer small intestine whereas carnivores have a shorter small intestine
4. Name the intermediate 3-C molecule formed from 6-C molecule of glucose during respiration.
5. From where do terrestrial and aquatic organisms get oxygen?
6. Specify the location where a) glucose is converted into 3-C molecule of pyruvate b) pyruvate into CO2, H2O and energy.
7. Name the pigment present in a) blood, b) muscles of higher organisms that help in transportation of respiratory gases.
8. What is the respiratory product formed in muscles when a) there is sufficient supply of oxygen b) lack of oxygen during vigorous exercise
9. Which of the two -aerobic / anaerobic respiration is energy efficient?
10. Name the end product formed in a) aerobic respiration b)anaerobic respiration
11. Rate of breathing in aquatic organisms is faster than terrestrial organisms. Give reason.
12. In the given diagram:

13. a). Name the common path of respiratory system and digestive system.
b). Which structure is responsible for the uplifting of ribs during inhalation?
c). Name the structure responsible for production of sound.
d).What is labeled as 'C' in the given diagram? Mention its function.
14. .What is function of hairs in nasal chambers?
15. How does the gaseous exchange across the alveoli take place?
16. After gaseous exchange concentration of which gas would be more in a) alveoli b) blood.

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.

DIGESTION OF FOOD

HUMAN DIGESTIVE SYSTEM