(a(i))[3]
Identify the structures marked P, Q and R in Fig. 4.1.
(a(ii))[1]
Name the organ which contains many nephrons.
(a(iii))[1]
Name the organ that stores fluid S before it is released from the body.
(b(i))[1]
State why it is important that urea is removed from the blood in fluid S.
(b(ii))[5]
Use your understanding of nephron function to explain the glucose and protein concentrations in fluid S.
(b(iii))[3]
Explain what would happen to the ion concentration in fluid S if the person drank a large volume of water several hours before the sample was taken.