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Enlist the parts of human urinary system and briefly define their role.
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How do human lungs maintain carbon dioxide level in blood?
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How does skin play its role in homeostasis?
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Name the major organs involved in homeostasis in humans,
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Define Osmosis.
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What are resins, gums, latex and mucilage?
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How do the plants secrete calcium oxalate from their body?
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What is the difference between transpiration and guttation?
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Write the various methods for removal of excess water from the plant body.
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How do the plants excrete extra carbon dioxide and oxygen from their body?
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Define excretion.
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Differentiate between osmoregulation and thermoregulation.
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What do you mean by homeostatsis? Why is it necessary?
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Is small quantity of nicotine beneficial?
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Write three measures taken by the government to discourage people
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What are the effects of tar on lungs?
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What are the main effects of smoking?
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What do you observe about the position of the heart in normal and smoker's chest cavity?
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Compare non-smokers' lungs with those of smokers and note your observations.
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