(a)[2]
State two additional substances that healthy kidneys excrete.
(b(i))[3]
Fill in Table 4.1 with the information from Fig. 4.1.
(b(ii))[2]
Suggest which of solutions A, B or C contained the greatest amount of sugar. Give a reason for your choice.
(c)[2]
List two factors that affect the volume and concentration of urine produced.
(d)[2]
State two other routes by which the body loses water.