PHYSIOLOGY OP 1 BE DIi 



HI 



trie juice; cream takes considerably long* be be than milk. 



and the presence of oil in the stomach delays the 



out on a subsequent meal of otherwise readily digestible t I B 



lectin- all of the gastric juice from the miniature Btomach i 



by mouth with quantities <>!' differenl protein-rich Eoodi 



same quantities of nitrogen, interesting observations have be< p 



<•« > 1 1 .-( ii i i 11 *j: the amounl of juice Becreted ami its proteolytic power. '1 I 



results of some of the experiments are Bhown in the accompanying 



curves (Figs. 150 and 151). 



It will bo seen that the mosl abundai etion occurs with meat. t ; 



mi' milk being not only smaller but also slower in starting Tl • 

 power is greatesl in the ease of bread. 



Hours 12345678234 56789234.56 

 100 



$ fi.O 

 h 6,0 



o o 4,0 



5' 



5 



2.0 



Flesh, 200 gm. 



. !, 200 gm. 



Milk. 600 c.c. 



Fig, 151. — Digestive power of the juice, as measured by the length of the rrotei- 



in Mett's tubes, with diets of flesh, bread, and milk. (From Pavb . 



THE INTESTINAL SECRETIONS 



Pancreatic Juice 



Regarding the natural secretion of pancreatic juice, litth 

 to what has already been said see page 125 Tl tion begins when the 



chyme enters the duodenum, and attains its maximum when the outfl 

 of this is greatest. By collecting the juice from a permanent fistula of the 

 pancreatic duct, it has been found thai the amount varies witl 



\ Is. When quantities of food containing equivalei I 



gen are fed, the greatest secretion is said t cur with bread and the ' 



with milk. Such difference 8 are probably d< t opo unt of 



acid Becreted in the Btomach and passed on into the duodenum, 

 thoughl at one time that, besides variation in qi 



enzymes in the pancreatic juice mighl \a>- • kind of 



food. This, however, has been shown 



