Figure 1. Insulin concentrations in effluent medium collected from perfused pancreata of male Sprague- Dawley rats. The upper panel shows insulin secretion in response to a 30-min period with 16.7 mmol/L Dglucose (bar) added to the perfusion medium. The lower panel shows insulin secretion in response to a 30-min period with 16.7 mmol/L D-glucose + 10 ng/mL angiotensin II (bar). Values represent means ± SEM for 6-7 experiments.