state the role of the following in the digestion of food in human 1 pancreatic juice 2 gastric juice 3 bile juice
Answers
amylase digest starch, trypsin digest protein, lipase digest fat.
2)the gastric juice contains dilute hydrochloric acid enzymes pepsinogen and mucus.
the enzyme pepsin digest protein present in the food.
dilute hydrochloric acid kill bacteria that enters through food.
mucus protect stomach Wall.
3) the bile is alkaline in nature and contains salts.the bile salts break the fats present in the food into small globules.
BIOLOGY- CLASS-X
WORKSHEET
LIFE PROCESSES
1. What is emulsification of fats?
2. Name any two organisms which breakdown the food material outside their bodies and then absorbed it
3. Why is nitrogen considered an essential element? How do plant acquire nitrogen?
4. How is the small intestine design to absorb digested food?
5. A variegated leaf with green and yellow patches is used for an experiment to prove that chlorophyll is
required for photosynthesis. Before the experiment the green portion (A) and the pale yellow portion (B) are
observed. What will be the colour of 'A' just before and after the starch test? Also write the equation of
photosynthesis and mark, as well as validate from which molecule the by- product is obtained?
6. State the function of the following in the alimentary Canal:
a. Liver
b. Gallbladder
c. Villi
7. State the role of the following in the digestion of food in humans:
a. Pancreatic juice
b. Gastric juices
8. Explain the process of assimilation of proteins in human digestive system?
9. Differentiate between the functions of enzymes pepsin and trypsin?
10. Name the cells that control the opening and closing of the stomatal pore? How do they perform this function?
11. Stomata of desert plant remain closed during day time. How do they up carbon dioxide and perform
photosynthesis?
12. With the help of a neet labelled diagram show how Amoeba captures it's food?
13. Write the name of the largest gland in human body? Name its secretion and organ where it is stored? Write
three functions of the above mention gland?
14. Draw a labelled diagram showing cross section of a leaf and labelled on it: phloem, vascular bundle, xylem,
lamina.
15. State the pathway of air from nostrils to the lungs in human beings?
16. Why cramps are caused in our muscles during sudden activity?
17. Write three points of difference between photosynthesis and respiration?
18. What type of arrangement exists in the bodies of large animals to meet their oxygen requirement adequately?
19. Show the breakdown of glucose by three pathways with the help of flow chart?
20. State the significance of flattened structure of leaf?
21. Why capillaries have walls which are one- cell thick?
22. State reasons for the following:
a. The inner wall of alimentary canal is not digested.
b. Valves are present between the left atrium and left ventricle as well as right atrium and right ventricle.
ventricle
c. During the breathing cycle, even after forceful exhalation of gases continues.
d. In green plants during the day carbon dioxide is generated in respiration but is not released out.
23. What is translocation? Name the cells involved in the transport of food in plants?
24. What is lymph? How is composition of lymph different from blood plasma? What is the direction of it's flow?
List two functions of the lymphatic system?
25. How does transpiration account for the transport of water during day time? Also enumerate the significance of
transpiration?