(a)[2]
Explain why excretion is necessary.
(b)[2]
Sketch a straightforward diagram of a human kidney with its ureter. Label the cortex, medulla and ureter on the diagram.
(c(i))[2]
Describe the structure of a glomerulus. You may use Fig. 3.1 in your response.
(c(ii))[2]
Describe the function of the glomerulus.
(d(i))[4]
Describe how salts are reabsorbed against a concentration gradient.
(d(ii))[4]
Determine whether the evidence in Table 3.1 backs up this hypothesis. Show your working.
(d(iii))[1]
State the name of the process mammals use to take back water.
(d(iv))[1]
State the name of one more molecule that is also reabsorbed in kidney tubules.