Which of the following options is not a direct function of the mammalian kidney?
Ultrafiltration of blood plasma in the Bowman's capsule
Selective reabsorption of glucose in the proximal convoluted tubule
Synthesis of the hormone aldosterone to regulate sodium levels
Reabsorption of water in the collecting duct
17 exam-style questions on OCR A A Level Biology Excretion as an example of homeostatic control. Each one has a worked solution and a mark scheme showing where the marks go.