- Exogenous CCK and gastrin stimulate pancreatic exocrine secretion via CCK-A but also via CCK-B/gastrin receptors in the calf. Le Dréan, G., Le Huërou-Luron, I., Gestin, M., Desbois, C., Romé, V., Bernard, C., Dufresne, M., Moroder, L., Gully, D., Chayvialle, J.A., Fourmy, D., Guilloteau, P. Pflugers Arch. (1999)