Igcse Model Questions Vol1 2021 Biology Question 6

Practice essay / theory question 6 from the 2021 Igcse Model Questions Vol1 Biology examination. This question covers Excretion .

Igcse Model Questions Vol1 2021 Biology Essay / Theory
Topic: Excretion
Question 6 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • essay

Describe the processes involved in human excretion and the factors that regulate urine formation.

Question Parts

( a )
Outline the three main processes that produce urine in the kidney, stating where each process occurs.
( b )
A person drinks 2 L of water per day. Their kidneys filter 180 L of plasma each day. If 99 % of the filtrate is re‑absorbed, calculate the volume of urine produced in a day.
( c )
Explain how the hormone antidiuretic hormone (ADH) influences the concentration of urine and give one physiological situation in which ADH secretion is increased.

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About This Question

This is Igcse Model Questions Vol1 2021 Biology Question 6. It is one of the essay questions from the 2021 Igcse Model Questions Vol1 Biology examination.

The question covers Excretion .

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