Life Processes Worksheet-4

Life Processes Worksheet-4

21. Name the passage that leads bile from liver into the gall bladder.

22. Name the different parts of the large intestine of humans in their natural sequence.

23. Name the structures which help in excretion in (i) tapeworm and (ii) earthworm

24. What is formed when CO₂ combines with globin of reduced haemoglobin? Where does it occur?

25. Why is blood group identification not required while transfusing serum?

26. Which is the food constituent that bile helps to digest and absorb?

27. Which is the largest gland in our body?

28. Name two enzymes that take part in digestion of proteins in our body.

29. Name one accessory pigment and one essential pigment in photosynthetic plants.

30. Differentiate between tracheoles and bronchioles.

31. Mention two structural features of small intestine which add to the absorptive capacity.

32. Name the phase of the cardiac cycle in which both auricles and ventricles are relaxed simultaneously.

33. Normally a vein opens into a large vein or into the heart, but does not end in capillaries. Which one or more veins in humans is/are exception (s) to this rule?

34. Name the photosynthetic pigments belonging to carotenoids.

35. Name two photosynthetic pigments belonging to chlorophyll.

36. Specify two conditions in which photo-respiration may take place in green plants.

37. Why is nutrition necessary for an organism?

38. Name the pigment, which can absorb solar energy.

39. In which kind of respiration more energy is released?

40. Name the membrane covering the lungs.

Answer:

21. Cystic duct.

22. Caecum, Colon and Rectum.

23. (i) Tapeworm – Flame cells      (ii) Earthworm – Nephridia.

24. Carbamino haemoglobin.

Its formation occurs in the tissue cells.

25. Serum lacks RBCs, fibrinogen and antigen. Fibrinogen is required for blood clotting. Therefore, due to its absence, blood will not clot. Hence, there is no need of identifying blood group while transfusing serum.

26. Fats.

27. Liver.

28. Pepsin and Trypsin.

29. Accessory pigment – Carotene/Xanthophyll

Essential pigment – Chlorophyll.

30. Differences between:

Tracheoles Bronchioles

(I) These are the branches of

trancheae in insects (I) These are the branches of bronchi in mammals.

(II) They open into body fluid. (II) They end up in alveoli.

31. Two structural features of small intestine are:

(I) Villi is present to increase the absorptive surface area.

(II) Lacteals in the villi receive the products of fat digestion.

32. Joint diastole.

33. Hepatic portal vein, Hypophyseal portal vein.

34. Carotene and Xanthophyll.

35. Chlorophyll a and Chlorophyll b

36. Two conditions in which photorespiration may take place in green plants are:

(i) High concentration of oxygen and (ii) High temperature.

37. –

38. Chlorophyll.

39. Aerobic respiration.

40. Pleural membrane