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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
1 Answer State that glucagon is secreted by the pancreas
1 Answer 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
1 Answer 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
1 Answer 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
1 Answer Identify in diagrams and images the position of the fovea and state its function
1 Answer 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
1 Answer Describe the distribution of rods and cones in the retina of a human
1 Answer Explain the pupil reflex in terms of the antagonistic action of circular and radial muscles in the iris
1 Answer Explain the pupil reflex, limited to changes in light intensity and pupil diameter
1 Answer
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