(a)[3]
Fig. 8.1 shows a diagram of a kidney nephron. Using Fig. 8.1, name A, B and C.
(b)[3]
Antidiuretic hormone (ADH) helps maintain the water potential of the blood. Fig. 8.2 shows how blood ADH concentration is related to urine concentration and the flow rate of urine. The flow rate of urine is the rate at which the kidneys produce urine. Describe the relationships shown in Fig. 8.2.
(c)[5]
Describe and explain how ADH acts on the cells of the collecting duct when the water potential of the blood decreases.