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Q5 - Kidney Filtration, Excretion and Oxygen Use in Three Individuals

Theoretical A Real exam question - full text reproduced under IBO's CC BY-NC-SA 4.0 license
Comparative Osmoregulation & Excretion

In a study on kidney function, several parameters were measured in three healthy persons A–C (Table). Parameter values describing kidney functions. Assume that 1 millimol O2 has a volume of 22.4 ml (milli-litre).

Figure 1. Figure 1.

Using the information and data, determine which of the statements are true or which are false.

A. The amount of Na+ filtrated in the kidneys is largest for person A
B. The amount of Na+ excreted in the kidneys is largest for person B
C. Renal oxygen consumption is largest for person C
D. The amount of Na+ reabsorbed per mol of O2 used is largest for person B
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Question reproduced from IBO 2015, Theoretical Exam A, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)