Explain the role of auxin in controlling shoot growth, limited to: (a) auxin is made in the shoot tip (b) auxin spreads through the plant from the shoot tip (c) auxin is unequally distributed in response to light and gravity (d) auxin stimulates cell elongation
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Describe phototropism as a response in which parts of a plant grow towards or away from light
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Describe gravitropism as a response in which parts of a plant grow towards or away from gravity
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Describe the signs of Type 1 diabetes (limited to increased blood glucose concentration and glucose in urine) and its treatment (administration of insulin)
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Describe the control of blood glucose concentration by the liver and pancreas and the roles of insulin and glucagon
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Explain the need to control blood glucose concentration
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Explain how each of the following processes contributes to the maintenance of constant internal body temperature in mammals: (a) sweating (b) shivering (c) contraction of hair erector muscles (d) vasodilation and vasoconstriction of arterioles supplying skin surface capillaries
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Describe the roles of the hypothalamus and of temperature receptors in the skin in maintaining a constant internal body temperature in mammals
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Describe the role of insulation in maintaining a constant internal body temperature in mammals
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Describe homeostasis as the maintenance of a constant internal environment
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