INDEX. 



1049 



Intraventricular pressure, 551 

 Introductory contractions of muscle, 



35 



Invertase, 756, 806 

 Involuntary muscle, 55 

 lodin constituent of thyroid tissue, 



879, 880 



lodothyrin, 876, 878, 879 

 Iris, action of drugs upon, 328 



antagonistic action of muscles upon, 

 325 



muscles and nerves of, 324 

 Iron, effect of removal of spleen on, 

 838 



in hemoglobin, 430 



salts, source and nutritive impor- 

 tance of, 932 

 Irritability, definition of, 23 



of muscle, 23 



of nerve-fibers, 84 

 Isodynamic equivalent of foodstuffs, 



951 



Isoleucin, 800, 1025 

 Isometric muscular contractions, 28 

 Isotonic muscular contractions, 28 



solutions, definition of, 1036 

 Isotropous substance in muscle, 20 



JACOBSON, nerve of, 758 



Judgments, visual, of distance and 



size, 381 

 perspective or solidity, 376 



KENOTOXIN, 70, 672 



Kidney, action of diuretics on, 846 



blood-flow through, 847 



composition of secretion of (urine), 

 849 



function of convoluted tubules, 844 

 of glomerulus, 842 



secretion of urine in, 840 



stimulation of, by hormones, 849 



structure of, 839 

 Kinases, 756 

 Kjeldahl's method for determination 



of nitrogen, 852, 900 

 Knee-jerk, conditions influencing, 159 



definition of, 155 



explanation of, 157 



reinforcement of, 155 



use of, as diagnostic sign, 160 



LABOR, physiology of, 998 

 Lactacidogen, 68 

 Lactic acid, 917 



in muscle, 63 



increase of, during contractions, 



63,67 

 Laked blood, 422 



Langerhans, islands of, 897 

 Large intestine, digestion and absorp- 

 tion of food in, 812 

 movements of, 737 



Larynx, reflex effects from, on respi- 

 rations, 699 



Latent period of muscular contrac- 

 tion, 27 

 Law, all or none, 29 



of constant energy consumption, 



1021 

 growth-quotient, 1021 



of intestine, 732 



of surface area, 967 

 Lead sulphid reaction for proteins, 



1029 

 Lecithin, 78, 824 



as complement, 426 

 Lecithoproteins, 1032 

 Lemniscus, lateral, 215 



median, 204 

 Leucin, 800, 912, 1025 

 Leukocytes, effect of hemorrhage 

 upon, 471 



functions of, 444 



structure and classification, 443 



variations in number of, 444 

 Leydig's cells, 893 

 Liebermann's reaction for proteins, 



1029 

 Liebig's classification of foodstuffs, 



941 



Light-reflex in eye, 326 

 Lipase, 753 



activation of, 804 



in pancreatic secretion, 802 



reversible reaction of, 750 

 Lipoids, 78 



Lissauer, tract of, 168, 169 

 Listing's law, 370 



schematic eye, 310 

 Liver, acids of, 821 



bile pigments of, 820 



formation of urea in, 835 



glycogen of, 829 



glycogenic action of, 832, 833 



internal secretion of, 874 



pulse, 532 



quantity of bile, 819 



secretion of bile, 824 

 Localization of function in cerebellum, 



243 



in cerebrum, 192 

 Localizing power of skin, 284 

 Locke's solution, 575 

 Locomotor ataxia, 171 

 Ludwig theory of urinary secretion, 



840 



, Luminosity of visual sensations, 347 

 I Lungs, gaseous exchanges in, 686 



total surface of, 649, 688 



vasomotors of, 627 



