an enzyme present in the intestinal juice. By such n 

 ism the muoosa of the pancreatic duct is protected against nut oiliest ion 



hy Irypsin. 



NERVOUS CONTROL OF PANCREAS 

 Prior to the discovery of secretin, Pavlov 1 ami his pupils hud published 



numerous experiments purport in;;- lo show I lint the secretion of pnnerentk' 





Fig. 146". Pancreatic acini itjuiu-.l \\iih hematoxylin, Tlu- .u-ini at tlu- top -uul to UK- 



figure are from a resting gland, those 10 iiu- \\*.\\\ 1-. one tint h.u! IHTH sv.-u-tm^ 



for over three hourt as a result of aoul in thr duodenum. Tlu- lowermost figure is fi 

 the vagus nervr :l,iu-d oiv ami on toi several hi S te th.it 



the tymogen granules are extruded only after vagus activity but not aftei secretin activi 

 r.ai'Kin. Rubaacbkia .UK! Ss.u\tt^-h > 



nerve. The nmonnt of s 



ju'u-o is controlled through the 



produed 1\\ nervous stimulation VTES, bO"W6VeP, never found 10 l>e so 



ns ihnt produced by secretin, nnd for se\ ernl years nfler the discovery of 



