Igcse Model Questions Vol1 2017 Biology Question 34
Practice objective / multiple choice question 34 from the 2017 Igcse Model Questions Vol1 Biology examination.
A mammal's kidneys filter \(180\,\text{mL}\) of plasma each minute (glomerular filtration rate). Normally, 99 % of the filtered water is re‑absorbed, so the expected urine output is \(1.8\,\text{mL}\) per minute. If the animal is observed to produce urine at a rate of \(1.5\,\text{mL}\) per minute, calculate the actual percentage of filtered water that is excreted and state whether this differs significantly from the normal 1 % non‑reabsorbed value.
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This is Igcse Model Questions Vol1 2017 Biology Question 34. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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