Explain the concept of homeostatic control by negative feedback with reference to a set point
Explain the concept of homeostatic control by negative feedback with reference to a set point
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IGCSE Biology
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State that insulin decreases blood glucose concentration
State that insulin decreases blood glucose concentration
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Describe the role of adrenaline in the control of metabolic activity, limited to: (a) increasing the blood glucose concentration (b) increasing heart rate
Describe the role of adrenaline in the control of metabolic activity, limited to: (a) increasing the blood glucose concentration (b) increasing heart rate
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State that glucagon is secreted by the pancreas
State that glucagon is secreted by the pancreas
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Describe adrenaline as the hormone secreted in ‘fight or flight’ situations and its effects, limited to: (a) increased breathing rate (b) increased heart rate (c) increased pupil diameter
Describe adrenaline as the hormone secreted in ‘fight or flight’ situations and its effects, limited to: (a) increased breathing rate (b) increased heart rate (c) increased pupil diameter
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Identify in diagrams and images specific endocrine glands and state the hormones they secrete, limited to: (a) adrenal glands and adrenaline (b) pancreas and insulin (c) testes and testosterone (d) ovaries and oestrogen
Identify in diagrams and images specific endocrine glands and state the hormones they secrete, limited to: (a) adrenal glands and adrenaline (b) pancreas and insulin (c) testes and testosterone (d) ovaries and oestrogen
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Describe a hormone as a chemical substance, produced by a gland and carried by the blood, which alters the activity of one or more specific target organs
Describe a hormone as a chemical substance, produced by a gland and carried by the blood, which alters the activity of one or more specific target organs
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Identify in diagrams and images the position of the fovea and state its function
Identify in diagrams and images the position of the fovea and state its function
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Outline the function of rods and cones, limited to: (a) greater sensitivity of rods for night vision (b) three different kinds of cones, absorbing light of different colours, for colour vision
Outline the function of rods and cones, limited to: (a) greater sensitivity of rods for night vision (b) three different kinds of cones, absorbing light of different colours, for colour vision
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Describe the distribution of rods and cones in the retina of a human
Describe the distribution of rods and cones in the retina of a human
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Explain how using antibiotics only when essential can limit the development of resistant bacteria such as MRSA
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State that some bacteria are resistant to antibiotics which reduces the effectiveness of antibiotics
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Describe the use of antibiotics for the treatment of bacterial infections
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Explain the role of auxin in controlling shoot growth, limited to: (a) auxin is made in the shoot tip (b) auxin diffuses 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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Explain phototropism and gravitropism of a shoot as examples of the chemical control of plant growth
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Investigate and describe gravitropism and phototropism in shoots and roots
