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Excretion

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1
Question 1
a.

The table lists descriptions of what happens in different human organs involved in excretion and homeostatic control.

Complete the table by giving the correct organ for each description.

The first one has been done for you.

DescriptionOrgan
stores urine prior to excretionbladder
synthesises urea from toxic ammonia
excretes carbon dioxide, a waste product of respiration
contains nephrons that produce urine
releases ADH into the blood to regulate water reabsorption
[4]
b.

Describe the process of selective reabsorption in the proximal convoluted tubule. Refer to the adaptations of the tubule cells and the transport mechanisms involved in your answer.

[8]

Excretion Questions

  1. IGCSE
  2. /Biology
  3. /Excretion