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3.4.1 Homeostasis 3.4.2 Necessity for Homeostasis 3.4.3 The Structure of an Exchange System in Flowering Plants 3.4.4 The Breathing System in the Human.

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Presentation on theme: "3.4.1 Homeostasis 3.4.2 Necessity for Homeostasis 3.4.3 The Structure of an Exchange System in Flowering Plants 3.4.4 The Breathing System in the Human."— Presentation transcript:

1 3.4.1 Homeostasis Necessity for Homeostasis The Structure of an Exchange System in Flowering Plants The Breathing System in the Human Follow-Me – iQuiz

2 Q. What is homeostasis? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

3 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

4 Q. Note one reason why homeostasis is important in the human body. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

5 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

6 Q. What is the function of the stomata of the leaf? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

7 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

8 Q. Name the structures in plant cells in which photosynthesis occurs. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

9 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

10 Q. Name a gas that leaves the leaf at the stoma(ta). Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

11 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

12 Q. How do the nephrons of the kidneys contribute to homeostasis? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

13 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

14 Q. Name a factor that influences the diameter of the stoma(ta). Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

15 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

16 Q. Give a function of the guard cell. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

17 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

18 Q. Where do cilia occur in the breathing system? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

19 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

20 Q. State precisely the events that take place in the alveoli. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

21 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

22 Q. State the function of the epiglottis. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

23 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

24 Q. Name the process involved in the passage of gas between the alveolus and the blood. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

25 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

26 Q. How does the liver contribute to homeostasis? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

27 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

28 Q. Name the apertures in stems that are equivalent to stomata. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

29 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

30 Q. Name the process by which the gases move in or out of the leaf. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

31 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

32 Q. What is the function of cilia in the trachea? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

33 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

34 Q. In the spongy mesophyll, gases can diffuse throughout the leaf. Name one such gas. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

35 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

36 Q. Tiny holes called... allow gases to enter and leave the leaf. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

37 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

38 Q. How do the lungs contribute to homeostasis? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

39 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

40 Q. How are alveoli adapted for their purpose? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

41 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

42 Q. Name the main gas transported in the pulmonary vein. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

43 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

44 Q. How is oxygen transported in the blood? Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

45 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

46 Q. State the function of the larynx. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

47 CONGRATULATIONS Please CLICK on THIS BOX for the Next Question

48 Q. Describe the role of the diaphragm in inhalation. Absorption or release of glucose; Heat generation Allows normal metabolic activities; Keeps temperature suitable for enzyme reactions Close off trachea Chloroplasts Capillary network; Moist surface; Thin walled; Elastic wall; Large surface area; One cell thick Diffusion Controls stomatal size; Controls passage of gases Contracts, lowers and increases volume of thorax CO 2 ; Light intensity; Potassium ions; Water Excretion of water or CO 2 ; Release of heat Lenticels Make sound Osmosis Oxygen Exchange of gases – CO 2 out, O 2 in by diffusion Trachea Stomata Oxygen; Water vapour; Carbon dioxide; Nitrogen Their motion carries trapped dirt particles and bacteria upwards to the glottis Air; Water vapour; O 2 ; CO 2 ; N 2 Excretion or reabsorption of water; Excretion of salts; Reabsorption of salts Allow exchange of gases; Transpiration Maintaining a constant internal environment By oxyhaemoglobin

49 CONGRATULATIONS You’re Brilliant

50 Incorrect Please CLICK on THIS BOX to Try Again


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