Edexcel A-Level Biology A2 7.19 Urea Production and Ultrafiltration Questions

Explain how arteriole diameters create glomerular pressure, how the filtration barrier selects small molecules, and how marker excretion data gives GFR.

Exam points

link afferent and efferent arteriole diameters to high glomerular pressure
explain ultrafiltration through glomerular pressure, molecule size and the filtration barrier
calculate GFR from time and urinary marker excretion data

[Maximum number: 1]

The kidney is involved in the process of homeostasis in a mammal.

The electron micrograph shows a transverse section of part of a proximal tubule.

Figure for Question Edexcel A-Level Biology A2 7.19 Urea Production and Ultrafiltration Questions question 1 — Edexcel A-Level Biology A2

Name the process by which the fluid moves from the plasma into the renal tubule (nephron).

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Edexcel A-Level Biology A2 7.19 Urea Production and Ultrafiltration Questions question 1