(a)[3]
In mammals, excess amino acids cannot be kept in the body. Outline how liver cells convert excess amino acids into urea.
(b)[4]
The mammalian kidney contains numerous nephrons. Describe how ultrafiltration occurs in the nephron.
(c)[4]
Fig. 7.1 is a diagram of a nephron. Complete Table 7.1 by naming a nephron part that matches each statement: passes through the medulla glucose is reabsorbed into the blood ADH acts on its walls most of the water is reabsorbed into the blood