Give two characteristics of respiratory surfaces in animals 19 Give a reason

Give two characteristics of respiratory surfaces in

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18. Givetwocharacteristics of respiratory surfaces in animals 19. Give a reason for each of the following on mammalian Red blood cells(a) Absence of the nucleus (b) Biconcave shape 20. Statetwo ways in which bodies of people living in high altitude areas respond to low oxygen concentration. 21. Explain what would happen to a mammalian Red blood cell 30 minutes alter being placed in distilled water. 22. (a) State two ways in which the surface area of the fish filaments is increased for efficient gaseousexchange.(b) What is the importance of counter flow system in the filaments of a fish. 23.The apparatus below illustrates breathing in mammal.Describe what happens if the rubber plug is pulled in the direction shown by the arrow. 24.Describe the path taken by oxygen gas from atmosphere to the tissues of an insect. 25. Why should respiratory surfaces be: (i) Moist(ii) Thin26.The set up below represents an experiment to investigate the process of photosynthesis. The set up placed in sunlight for six hours.(a) Why was sodium hydrogen carbonate added to water in this experiment?(b) Explain why the number of bubbles reduced by evening(c) Explain why the water was used in this experiment(d) Explain why the water was used in this experiment27. (a) State twoadaptations of red blood cell to its functions(b) Name twoways in which carbon (IV) Oxide is transported in mammalian bloodCapillary tube Rubber balloon Rubber plug Syringe case Plunger
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28. The diagram below represents an organ from a bony fish. Study the diagram and answer the questions that follow: (a) State the functions of each of the following:(b) How is the structure labeled Cadapted to its function?29. State how the tracheal system in insects is adapted for gaseous exchange.30. Differentiate between active immunity and passive immunity31. Namethree sites where gaseous exchange takes place in terrestrial plants.32. An athlete training to take part in an international competition moved to a high attitude area wherehe was to train for twelve days before the competition. He took his pulses per minute daily and tabulated them as shown below:-a)Other than pulse rate, name oneother process which was affected by change of altitudeb) Account for the change in pulse rate from:- i) Day 1 to day 7ii) Day 8 to day 12c) Explain the advantage this athlete has over the one who trains in a lower altitude aread) The equation below represents a reaction which takes place during rapid muscular movements in humans.Glucose Lactic acid + 150KJi) State twoeffects of this reaction to an individualii) How is lactic acid finally eliminated from the muscle tissues of the human after the muscle 33.a) State any two structures used for gaseous exchange in plants.b) Name any twosites where gaseous exchange takes place in a leaf of a terrestrial plant.c) State any twotypes of leaves and their respective functions.d) Briefly describe how stoma opens.34. The diagram below represents a section of the human respiratory system: (a) One can inhale through path A, or B
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