Topic 8 Transport in humans. 1. Blood consists mostly of A. white blood cells B. red blood cells C. blood platelets D. water
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1 Topic 8 Transport in humans 1. Blood consists mostly of A. white blood cells B. red blood cells C. blood platelets D. water 2. Which of the following is not a correct match? Red blood cell White blood cell Blood platelet A. protects against diseases carries oxygen for blood clotting B. circular biconcave irregular shape pieces of broken cells C. no nucleus with nucleus no nucleus D. red in colour no colour no colour 3. White blood cells differ from red blood cells in that they A. have a nucleus B. contain haemoglobin C. have a definite shape D. are needed in the clotting of blood 4. All arteries (1) carry blood away from the heart. (2) carry oxygenated blood. (3) do not contain valves. A. B. C. D. (1) only (1) and (2) only (1) and (3) only (1), (2) and (3) 5. In small animals, such as Hydra, there is no special transport system. This is because A. the cells of Hydra do not need the same materials as the other animals B. Hydra uses water as a medium of transport C. the cells of Hydra obtain necessary materials by diffusion D. Hydra does not require oxygen for its survival 6. Transport systems are required in large organisms but not in small ones because A. the surface area for diffusion in large organisms is too large B. the distance for which substances in large organisms must travel is too long for diffusion alone to be effective
2 C. oxygen must be transported to cells D. blood must be transported to cells 7. Which of the following is a correct match of reaction and its site of occurrence? Reaction Site of occurrence A. haemoglobin + oxygen --> oxyhaemoglobin heart B. haemoglobin + oxygen --> oxyhaemoglobin brain C. oxyhaemoglobin --> haemoglobin + oxygen lungs D. oxyhaemoglobin --> haemoglobin + oxygen heart Directions: The following two questions refer to the diagram below, which shows the vertical section of a heart. P R S Q 8. Which of the following blood vessels contain(s) a high level of oxygen? (1) P (2) R (3) S A. (1) only B. (3) only C. (1) and (2) only D. (2) and (3) only 9. Which of the following blood vessels contains the highest level of urea? A. P B. Q C. R D. S 10. Food molecules absorbed from the ileum are carried throughout the body by the A. red blood cells.
3 B. C. D. white blood cells. plasma. haemoglobin. 11. Which of the following is a function of the valves in the human heart? A. To increase the blood pressure B. To prevent the backflow of blood C. To slow down the flow of blood D. To decrease the blood pressure 12. Which of the following blood vessels possess semi-lunar valves? (1) pulmonary artery (2) aorta (3) pulmonary vein (4) vena cava A. B. C. D. (1) and (2) only (1) and (3) only (2) and (4) only (3) and (4) only 13. The exchange of materials between blood and body cells takes place in the A. heart B. arteries C. veins D. capillaries 14. Which of the following shows the correct direction of blood circulation? A. B.
4 C. D. 15. Which of the following is the function of the lymph vessels in our body? A. They transport blood B. They return tissue fluid to the blood C. They produce antibodies D. They help in blood clotting 16. The composition of tissue fluid is A. the same as that of blood B. similar to that of blood, except without plasma proteins C. the same as that of plasma D. similar to that of plasma, except without plasma proteins 17. Lymphatic circulation can be distinguished from the blood circulation by the fact that (1) Lymph is circulated mainly by the movement of muscles other than those of heart (2) Lymph bathes the cells directly (3) Lymph contains white blood cells but no red blood cells (4) Lymph is important for transport of digested fats from the small intestine A. (1), (2) and (3) B. (1), (2) and (4) C. (1), (3) and (4) D. (2), (3) and (4) 18. The advantage(s) of double circulation over single circulations (are) that (1) A higher blood pressure can be maintained (2) The blood flow rate can be double that in single circulation (3) The oxygenated blood and deoxygenated blood can be completely separated. A. (1) only B. (1) and (2)
5 C. (1) and (3) D. (1), (2), (3) Directions: Questions refer to the diagram below which shows an experiment on the property of veins. Diagram 1 Diagram 2 Diagram To make the veins more conspicuous, the upper arm was tied. This was used to A. Decrease the blood pressure of the veins B. Increase the blood pressure of the veins C. Prevent blood from flowing to the lower arm D. Prevent blood from flowing from the lower arm back to the heart
6 20. The swellings appeared in diagram 1 was due to the blood flow being blocked by A. Fatty substances B. Lymph nodes C. Sphincters D. Valves 21. Why did the vein disappear in diagram 3? A. The vein had collapsed B. The vein had been broken down by the high blood pressure created C. The blood had been forced to upper arm but the supply of new blood from lower part was blocked D. The blood had squeezed out from the vein to the surrounding tissue
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