INDEX 



991 



Urea, 561, 643, 650 



in blood, 645 



during disease, 683 



excretion of, 561, 649 



retention of, in nephritis, 562 

 Urease, 82, 645 

 Uric acid, 563, 564, 667, 681 

 amount of, 556 

 chemical nature of, 667, 671 

 endogenous excretion, 680 

 in disease, 683 

 metabolism of, 667, 676 

 of blood, 681 



salts of, 564 



synthesis of, 677 

 under drugs, 681 

 Uric acid diathesis, 667 

 Uricase, 673 

 Uricemia, 683 

 Uricolytic index, 674 

 Urine : 



acids of, 563, 564 



amino acid, 564 



amount of, 556 



aromatic oxyacids of, 564 



chlorides of, 565 



composition, 560 



creatinine of, 563 



depression of freezing point of, 557 



excretion of, 544 



H-ion concentration of, 558 



in disease, 567 



hippuric acid, 564 



homogentisic acid, 565 



inorganic constituents of, 565 



nitrogenous constituents of, 560 



normal organic salts of, 560 



phosphates, 566 



physical processes involved in produc- 

 tion of, 14 



purine bodies of, 563 



rate of excretion, 675 



reaction of, 558 



skatole, 565 



solid constituents of, 560 



specific gravity of, 556 



sulphates of, 566 



total potential acidity of, 559 



urea of, 561 

 Uriniferous tubule, 541 

 Urobilin, 529 

 Urobilinogen, 530 

 Utilization limit, 688 



Vagus : 



control of heart, 222 

 impulses, afferent, 227 

 Vagus center, effect of nicotine on, 231 

 location of, 227 

 tonicity of 226 



Vagus nerve, influence on respiration, 



348 



Valine, 640, 641 



Valves, cardiac, mechanism of, 154 

 auriculoventricular, 154 

 semilunar, 155 



Van Slyke method for acidosis, 42, 43 

 Van Slyke method for amino groups, 636 

 Vascular reflex, 297 

 Varicose veins, 215 

 Vasoconstriction, 236 

 Vasoconstrictor fibers, 237 

 methods of detecting, 236 

 of extremities, 238 

 of head, 238 

 of viscera, 238 

 origin of, 237 

 Vasodilator fibers, 239 



methods for detecting, 236 

 origin of, 239 

 Vasomotor center: 



afferent impulses, 243, 244 

 ehiSf center, 240 

 effect of H-ion of blood on, 242 

 hormone control of, 242 

 subsidiary centers, 240 

 Vasomotor fibers, 236 



origin of, 237 

 Vasotonic impulses, 241 

 Veins, disappearance of pulse in, 205 

 Velocity constant, enzymes, 75 

 Velocity, mean lineal, 206 



pulse, 200 



Venous blood, tension of CO 2 in, 359 

 Venous inflow, 216 

 Venous outflow, 235 

 Venous pulse tracing, 285 

 Venous sinuses, intracranial, 255 

 Ventilation : 



chemical conditions of air and, 754 

 physical conditions of air and, 757 

 physiological principles of, 754 

 susceptibility to infection and, 759 

 Ventilation of lungs, 367 

 Ventricle, curves of pressure in, 146, 148, 



151 

 Ventricles : 



conductivity tissue of, 182 

 fibrillation, 195 

 spread of beat in, 192, 194 

 Vignin, 612 



Viscera, blood supply of, 254 

 Visceral bloodflow, 212 

 Viscosity of blood, 141 

 Visual area, 880 

 Visuo-motor areas, 886 

 Vital activity, 14 



