Edexcel IAL Biology 7.19 Urea production and ultrafiltration

Trace deamination in the liver, identify pressure created by arteriole diameters and use molecule size plus filtration-barrier features to justify what enters filtrate.

Exam points

Explain deamination of excess amino acids and conversion of amine groups to urea.
Link afferent and efferent arteriole diameters to high glomerular pressure.
Calculate filtration volume or GFR from time, blood volume or marker 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 7.19—Urea production and ultrafiltration 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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7.19—Urea production and ultrafiltration question 1