(a)[3]
Define what is meant by excretion.
(b)[3]
Fig. 1.1 shows a kidney section. State the names of the parts labelled A, B and C on Fig. 1.1.
(c(i))[2]
Calculate the percentage increase in urea concentration from the blood in the renal artery to the urine. Show your working.
(c(ii))[2]
Describe the results for the concentration of salts in Table 1.1.
(c(iii))[1]
State why the concentration of protein differs between the blood in the renal artery and the fluid in the kidney tubule.
(c(iv))[1]
State why the glucose concentration differs between the fluid in the kidney tubule and the urine.
(d)[3]
State the advantages of having a kidney transplant rather than dialysis.