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AQA A-level biology unit 6 - Homeostasis, mark scheme answers

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Alport syndrome (AS) is an inherited disorder that affects kidney glomeruli of both men and women. Affected individuals have proteinuria (high quantities of protein in their urine). Suggest how AS could cause proteinuria. (2 marks)

Alport syndrome (AS) is an inherited disorder that affects kidney glomeruli of both men and women. A...

- Affects/damages basement membrane - Proteins can pass into the (glomerular) filtrate/tubule

Each year, a few people with type I diabetes are given a pancreas transplant. Pancreas transplants are not used to treat people with type II diabetes. Give two reasons why pancreas transplants are not used for the treatment of type II diabetes. (2 marks)

Each year, a few people with type I diabetes are given a pancreas transplant. Pancreas transplants a...

- (Usually)Type II produce insulin - Cells/receptors less sensitive/responsive (to insulin) - (Treated/controlled by) diet/exercise

Why does urine not contain: (2 marks) a) Proteins and blood cells b) Glucose

a) Proteins are too large to be filtered out of the blood b) All glucose is absorbed at the selective reabsoprtion stage in the PCT

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