Explain the effect of physical activity on the heart rate
Explain the effect of physical activity on the heart rate
1 Answer 
Questions and Answers For
IGCSE Biology
322 Questions
1 Answer Describe the functioning of the heart in terms of the contraction of muscles of the atria and ventricles and the action of the valves
Describe the functioning of the heart in terms of the contraction of muscles of the atria and ventricles and the action of the valves
1 Answer Explain the importance of the septum in separating oxygenated and deoxygenated blood
Explain the importance of the septum in separating oxygenated and deoxygenated blood
1 Answer Explain the relative thickness of: (a) the muscle walls of the left and right ventricles (b) the muscle walls of the atria compared to those of the ventricles
Explain the relative thickness of: (a) the muscle walls of the left and right ventricles (b) the muscle walls of the atria compared to those of the ventricles
1 Answer Identify in diagrams and images the atrioventricular and semilunar valves in the mammalian heart
Identify in diagrams and images the atrioventricular and semilunar valves in the mammalian heart
1 Answer Discuss the roles of diet and exercise in reducing the risk of coronary heart disease
Discuss the roles of diet and exercise in reducing the risk of coronary heart disease
1 Answer 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
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
1 Answer Investigate and describe the effect of physical activity on the heart rate
Investigate and describe the effect of physical activity on the heart rate
1 Answer State that the activity of the heart may be monitored by: ECG, pulse rate and listening to sounds of valves closing
State that the activity of the heart may be monitored by: ECG, pulse rate and listening to sounds of valves closing
1 Answer Describe the single circulation of a fish
Describe the single circulation of a fish
1 Answer Top Questions
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Give comparison between the following: (a) C3 and C4 pathways (b) Cyclic and non-cyclic photophosphorylation (c) Anatomy of leaf in C3 and C4 plants
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Figure 11.10 shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions: (a) At which point/s (A, B or C) in the curve light is a limiting factor? (b) What could be the limiting factor/s in region A? (c) What do C and D represent on the curve?
Light is the limiting factor at points A and B...
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Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green ? Why?
Leaves on the shady side or from shade-grown plants are...
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Suppose there were plants that had a high concentration of Chlorophyll b, but lacked chlorophyll a, would it carry out photosynthesis? Then why do plants have chlorophyll b and other accessory pigments?
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