Figure 9. Regional difference in ACh content, ACh release and Isc response between the proximal and distal colon.
A, ACh release induced by luminal propionate (1 mm). B, Isc increase induced by luminal propionate (1 mm). Values are means ±s.e.m. (n= 4). *P < 0.05 compared between the proximal and distal colon by Student's t test.