12 exam-style questions · Biology only (B): not in Science (Double Award). Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
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3.25B Ultrafiltration
Exam question
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Explain how ultrafiltration happens in the glomerulus.
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Total for this question: 3 marks
3.25B Ultrafiltration
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Name three substances found in the glomerular filtrate.
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Total for this question: 3 marks
3.25B Ultrafiltration
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Name two components of blood that are not filtered.
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Total for this question: 2 marks
3.25B Ultrafiltration
Exam question
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Why is blood pressure high in the glomerulus?
(1)Total for this question: 1 mark
3.25B Ultrafiltration
Exam question
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Explain why a fall in blood pressure reduces filtration in the kidneys.
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Total for this question: 2 marks
3.25B Ultrafiltration
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Blood plasma enters the kidneys at 660 cm³ per minute and 20 % of it is filtered. Calculate the volume of filtrate formed per minute.
(2)Total for this question: 2 marks
3.25B Ultrafiltration
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The kidneys form 180 dm³ of filtrate per day and produce 1.5 dm³ of urine. Calculate the percentage of the filtrate that is reabsorbed.
(2)Total for this question: 2 marks
3.25B Ultrafiltration
Exam question
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Explain why the filtration is described as "ultra" filtration.
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Total for this question: 2 marks
3.25B Ultrafiltration
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Describe the barrier that molecules cross during ultrafiltration.
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Total for this question: 2 marks
3.25B Ultrafiltration
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Suggest why protein in the urine may show that a kidney is damaged.
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Total for this question: 2 marks
3.25B Ultrafiltration
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Explain why useful substances such as glucose are filtered and then reabsorbed.
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Total for this question: 2 marks
3.25B Ultrafiltration
Exam question
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Compare the composition of blood plasma entering the glomerulus with the filtrate.
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Total for this question: 2 marks
