IGCSE Biology

Identify in diagrams and images the atrioventricular and semilunar valves in the mammalian heart

Discuss the roles of diet and exercise in reducing the risk of coronary heart disease

Describe coronary heart disease in terms of the blockage of coronary arteries and state the possible risk factors including: diet, lack of exercise, stress, smoking, genetic predisposition, age and sex

Investigate and describe the effect of physical activity on the heart rate

State that the activity of the heart may be monitored by: ECG, pulse rate and listening to sounds of valves closing

Describe the single circulation of a fish

Describe the circulatory system as a system of blood vessels with a pump and valves to ensure one-way flow of blood

Explain why some parts of a plant may act as a source and a sink at different times

Describe: (a) sources as the parts of plants that release sucrose or amino acids (b) sinks as the parts of plants that use or store sucrose or amino acids

Explain how and why wilting occurs