(a)[2]
Ultrafiltration in the kidney occurs between the glomerulus and the Bowman’s capsule. The afferent blood vessel that carries blood to the glomerulus has a wider lumen than the efferent blood vessel. Explain why the lumen of the afferent blood vessel has to be wider than the lumen of the efferent blood vessel.
(b)[2]
Fig. 9.1 shows a diagram of part of the glomerulus and Bowman’s capsule. (i) Name A and B.
(b(i))[2]
Name A and B.
(b(ii))[3]
Describe the roles of A and B in the formation of the glomerular filtrate.