Figure 3. Concentrations of glucose at abluminal surfaces of villus capillaries (C_b): effects of blood flow.

A, data from rat showing the relation between C_b and the intestinal absorption rate of glucose (J_S) under three conditions where the increase in villus blood flow (and hence PS) with J_S is either ‘normal’ (i.e. Q_b = 0.11 + 0.018J_S as in Table 2) shown by • in the middle curve, twice ‘normal’ (▵) or half ‘normal’ (^). B, similar data from human subjects where the ‘normal’ response is given by Q_b = 0.9 + 0.02J_S and the same symbols as in A show half ‘normal’ and twice ‘normal’ responses.