344 INDEX OF SUBJECTS. 



PERMEABLE MEMBRANES (see Membranes') 



PLASMOLYSIS, 269 



PLASTEIN, 143 



PLATINUM, colloidal, 95 



POLARISCOPE, 108 



POLYPEPTIDES, 125 



POLYURIA, 314 



PRECIPITATION MEMBRANES (see Membranes) 



PROFERMENTS, 92; of alkali-proteinase, 92; of caseinase, 93; 

 of lipase, 93; of acid-proteinase, 93 



PROTAGON, as a lipoid, 274 



PROTEASE, in intestinal juice, 75, 146; isolation of, 147; diges- 

 tion products of, 148; and alkali-proteinase, 148; and 

 casein, 148 ; substances attacked by, 148 ; effect of medium 

 on, 149 ; and proteolysis, 301 ; physiological importance of, 

 308, 309, 310 



PROTEIN DIGESTION (see Proteolysis) 



PROTEINASES, 75 (see also Acid-, Alkali-, and Ampho-proteinase) ; 

 recognition of , 129; quantitative estimation of , 129; rever- 

 sible action of, 140, 307, 308 



PROTEINS, rate of leaving stomach, 17; digestion of, 75, 300, 

 301; synthesis of, 141, 146; absorption of, 299, 300; chan- 

 nels of absorption of, 302 ; role of stomach in absorption of, 

 302, 303, 304; role of pancreas in absorption of, 302, 303, 

 304; role of intestine in absorption of, 303; fate of after 

 digestion, 304, 305; synthesis of, in intestinal wall, 306, 307 



PROTEOLYSIS, products of, 121, 125; mechanism of, 124; dia- 

 gram of, 127; cleavage theory of, 128 



PROTEOLYTIC FERMENTS (see Proteinases) 



PROTEOSES, 124 



PSEUDO-SOLUTIONS (see Colloids and Colloidal solutions) 



PSYCHIC SECRETION, 61; of gastric juice, 203; of pancreatic 

 juice, 225 



PTYALIN (see Amylase) 



PUTREFACTION of alimentary contents, 242 



PYLORUS, behavior of, during digestion, 12 ; opening and closing 

 of, 12, 14, 16; rhythmic opening of, 230 



RADIOGRAPHS, 7 



