Figure 4
From: Purinergic mechanosensory transduction and visceral pain
A. ATP concentration ([ATP]) in perfusate immediately before and after distension of the human ureter, grouped in pressure ranges. The mean [ATP] after distension is significantly greater than before distension in each pressure range P < 0.01; n = 7, error bars represent s.e.m. (Reproduced from [35], with permission from Springer.) B. ATP concentration in luminal fluid samples from normal and inflamed rat colorectum during distension. Values are means ± SE. (Reproduced from [67] and used with permission from the American Physiological Society.)