Clutches and Bands in an Automatic Transmission. In the last section, we discussed how each of the gear ratios is created by the transmission. For instance, when we discussed overdrive, we said:
Materials move in opposite directions: reabsorption moves materials into the blood, whereas secretion removes them from the blood. Blood pressure in the glomerulus is _______ than in other capillaries due to the relatively large diameter of ________ arterioles. higher; afferent.
1 The substance that remains in the collecting duct of the kidneys following reabsorption is better known as urine.  Tubular secretion is the transfer of materials from peritubular capillaries to renal tubular lumen and occurs mainly by active transport.