5. How is small intestine designed to absorb digested food?
6. How are the lungs designed in human beings to maximize the area for exchange of gases?
7. Which pancreatic enzyme is effective in digesting proteins?
8. Which enzyme present in saliva breaks down starch?
9. Mention two structural features of small intestine which add to the absorptive capacity.
10. State the basic difference between the process of respiration and photosynthesis.
11. Name the two ways in which glucose is oxidised to provide energy in various organisms
12. Give one point which is common for both aerobic and anaerobic respiration
13. Why is anaerobic respiration less efficient?
14. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like
humans?
15. Name the component of blood that helps in the formation of blood clot in the event of a cut.
16. Which pigment is responsible for the transport of nutrients, respiratory gases, metabolites,
hormones and waste product
17. Name the tissue which transports soluble products of photosynthesis in a plant.
18. Name the tissue which transports water and mineral in a plant.
19. What are the two important differences between trypsin and rennin.
20. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
Answers
Answer:
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Answer:
5.samall intestine have a large no. of finger like structure called villi which absorbs digested food and increase the surface are
6.lungs have a large no. of alveoli which hve thin and delicate surface. they are responsible for the exchange of gases
7.trypsin
8.amylase
9. it is coiled and have large no. of villi
10. respiration is a process in which O2 is taken and CO2 is given out
photosynthesis is a process in which gloves is formed.