Life Processes Worksheet-12
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Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like us?
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What are outside raw materials used for by an organism?
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What processes would you consider essential for maintaining life?
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Where does the plant get each of raw materials for photosynthesis?
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What is the role of the acid in our stomach?
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Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
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How are water and minerals transported in plants?
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How is food transported in plants?
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What would be the consequences of a deficiency of haemoglobin in our bodies?
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Describe the mechanism of blood clotting.
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State the two vital functions of the human kidney. Name the procedure used in the working of artificial kidney.
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Point out differences between an artery and a vein.
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Write any two points of difference between respiration in plants and respiration in animals.
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Name any two autotrophic plants which also show heterotrophic mode of nutrition. Why do they need to do so?
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Amylase is secreted by two different glands. Name them. What is the action of amylase on food?
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What is the role of HCl in protein digestion?
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Bring out the differences between internal respiration and external respiration.
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Draw a labelled diagram to show the human duodenum and the duct system of the associated digestive glands pouring into it.
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Name the passage in sequence through which urine passes from kidneys to the outside in humans. How is urine prevented from flowing back into the ureters?
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Why is sino-atrial node also called pace maker?
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How is the digested fat absorbed in the body?
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Bile juice does not contain any digestive enzymes, yet it is essential for digestion, why so? Explain.
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What is a cardiac cycle?
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Name two proteases in pancreatic juice. What are their specific roles?
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How would digestion of food be affected if the bile duct is completely blocked? Explain.
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How would non-secretion of hydrochloric acid in our stomach affect food digestion? Explain.
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How would non-secretion of saliva affect digestion of food in our mouth?
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How would it affect the digestion of proteins and carbohydrates in the duodenum of man if there is a blockade in the pancreatic duct? Explain.
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Give two protein digesting enzymes of pancreatic juice with their action.
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Define nutrition. What are the different modes of nutrition?
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State the function of epiglottis.