Q. 27. What is the function of anal sphincter?
Q. 28. Name the site of anaerobic and aerobic respiration in a cell.
Q. 29. A three carbon compound is the common product of both aerobic and anaerobic pathway. What is that?
Q. 30. Why do we get muscle cramp after vigorous exercise?
Q. 31. Distinguish between lactic acid and alcoholic fermentation?
Q. 32. Name the energy currency molecule of cell?
Q. 33. The breathing rate of aquatic animals is high, why?
Q. 34. What is the function of mucus and fine hair in nostrils?
Q. 35. Give the function of network of capillaries on alveoli.
Q. 36. Name the main carrier of oxygen and carbon dioxide in man.
Q. 37. Why does haemoglobin molecule act as efficient carrier of oxygen than diffusion process?
Q. 38. Give example of any three substances transported by plasma.
Q. 39. Name the organ that- (a) pushes blood around body (b) make blood to reach to tissues.
Q. 40. Name the blood vessel that carries blood from heart to lungs and from lungs to heart.
Q. 41. How many heart chambers are there in (a) fish (b) frog (c) lizard (d) crocodile (e) birds (f) man?
Q. 42. Name the device that measures blood pressure.
Q. 43. What is the normal blood pressure of man?
Q. 44. Why capillaries are thin walled?
Q. 45. Which cell of blood help in wound healing?
Q. 46. What is the other name of lymph?
Q. 47. Give two function of lymph.
Q. 48. .What is the direction of flow of water in xylem and food in phloem?
Q. 49. Why do plants need less energy than animals?
Q. 50. Which process acts as suction to pull water from xylem cells of roots.
Q. 51. Mention two functions of transpiration.
Q. 52. What are the two substances transported through phloem tissue?
