INDEX 



741 



Posterior columns of the cord, 562, Fig. 254. 



Posterior horn of the cord, 563. 



Posterior roots of the spinal nerves, 563, 564, 



566. 



Postganglionic fibers, 687, 688, 689. 

 Potassium salts, effect of, on heart, 25. 

 on smooth muscle, 25. 



importance of, in plants, 24. 



toxicity of urine due to, 381. 

 Potential, electrical differences of, 47, 418. 

 Potential energy of foodstuffs, 92; see also 



Energy. 



Precipitins in the blood, 156. 

 Preganglicnic fibers, 686, 689. 

 Pregnancy, 697. 

 Presbyopia, 530. 

 Pressure, abdominal, 299, 699. 



in the mouth cavity, 279, 280. 



in the respiratory passages, 321. 



intracardial, 169, Fig. 56; 170, Fig. 57; 171, 

 Fig. 58; 173, Fig. 60. 



intracranial, 678. 



intrathoracic, 228, 310. 



intrauterine, 698, Fig. 302; 699, Fig. 303. 



of the blood, see Blood pressure. 



osmotic, 31 ; see also Osmotic phenomena. 

 Pressure points or spots in the skin, 459, Fig. 



182; 462. 

 Pressure sensations, 458, 461. 



application of Weber's law to, 456. 



local sign of, 463. 

 Pressure sense, 461. 



area for, in cortex, 652. 



end organs of, 468. 



nerves of, 461. 



tract for, in the cord, 597. 

 Primary follicle, 695. 

 Primordial myelogenetic regions of the cortex, 



667. 



Primordial ova, 695. 

 Primordial sheath, 33. 

 Products of metabolism, see Decomposition 



products. 



Projection of sensations in general to the 

 external world, 454. 



of visual sensations to the external world, 



552. 



Projection fibers of the brain, 667. 

 Promoting nerves of the heart, 192. 

 Prosencephalon, 600. 

 Prostate, 691. 



Prosthetic group in compound proteids, 75. 

 Protagon, 79. 

 Protamins, 70, 77. 

 Protection, against loss of heat, 404. 



insured by blood, 157. 



means of, for lungs, 323, 324. 

 Proteid, absorption of, 305. 



amount of, in dailv ration, 142. 



Proteid, chemistry of, see Proteids. 

 circulating, 134. 

 decomposition of, in body, 369. 

 determination of, in food, 83, 84. 

 importance of, in metabolism, 98. 

 in urine, 384. 

 metabolism of, 99. 



in fasting, 97. 



in muscular activity, 112. 



influence of body mass on, 117. 



influence of, on total metabolism, 102. 



proportional to proteid ingested, 99. 



with carbohydrates, 105. 



with fats, 104. 



physiological heat value of, 93. 

 putrefaction of, in intestine, 378. 

 relation of, to living substance, 20. 

 requirements, different views on, 142. 

 retention, 120. 



in growing body, 123. 

 source of fat in the body, 129, 130. 

 source of glycogen, 127. 

 synthesis of, in animals, 25. 



in plants, 23. 

 tissue, 134. 

 utilization of, 138. 

 Proteids, action of digestive fluids on, 248, 252, 



255. 



as constituents of dead protoplasm, 20. 

 atomic groups in, 70. 

 carbohydrate groups in, 71. 

 chemical constitution of, 69, 70, 82. 

 color reactions for, 72. 

 compound, 75. 

 conjugated, 75. 

 crystallized, 68, 69, Fig. 38. 

 formation of, in plants, 23. 

 modified, 68. 

 native, 69. 

 of blood, 154. 

 of milk, 701, 703. 

 origin of, 23. 



percentage composition of, 82. 

 physiology of, see under Proteid. 

 phosphorus-containing, 75, 76. 

 precipitants of, 69. 

 properties of, 68. 

 salted out, 69. 

 simple, 75. 

 solubility of, 68, 69. 

 Proteolytic enzyme, 243. 

 in intestine, 255. 

 in pancreas, 252. 

 in stomach, 248. 

 Proteoses, 250. 



Protoalbumose, food value of, 108. 

 Protoplasm, appearance of, 20. 

 chemical constitution of, 20. 

 chemical nature of, 68. 



