Figure 2 - Gastrointestinal transit of a liquid meal in urethane (U)-anesthetized rats treated with scorpion toxin (U + TX, N = 8) or saline (U + S, N = 9) and in control awake (C + S, N = 6) rats. Data are individual values of the geometric center of the distribution of radioactivity from the stomach and proximal duodenum (segment number 1) up to the distal small bowel (segment number 6). Animals were studied 60 min after intraduodenal instillation of a 1.0-ml bolus of saline labeled with ^99mtechnetium coupled to an unabsorbable carrier. Horizontal bars represent the medians. The TX dose was 250 µg/kg.