INDEX 
nervous control of oxygen 
secretion in, 63 
reversal of direction of 
oxygen secretion in, 64 
structure, 63 
Sympathetic nerves, to heart, 
73 
“Symptoms of CO poisoning, 
48 
oxygen deficiency, 42, 43 
Temperature regulation, 80, 
89 
in dog, by respiration, 13 
Teneriffe, Peak of, 50 
Test for presence of CO in 
air, 46 
Thyroid in physiological reg- 
ulation, 80 
Tissandier, 44 
Unconscious activities, 1 
Urea, 39 
Urea excretion, 83 
in starvation, 83 
Urine, “buffer substances” in 
40 
lactic acid in, 41 
nitrogen of, as index of 
blood alkalinity, 39 
reaction of, 40 
secretion, effect of sweat- 
ing on, 79 
sodium chloride of, after 
large intake of water, 78 
137 
Vagus apnoea, 22 
Vagus nerves, effect of cut- 
ting on breathing, 21, 25, 
26 
influence on breathing, 21, 
22, 23, 24, 26 
to heart, 73 
Vapour pressure, in alveoli, 
13, 14 
Vaso-construction, chemical, 
70 
nervous, 70 
regulation by 
glands, 75 
regulation of circulation 
rate by, 72 
Vaso-motor center, 70 
control of local blood sup- 
ply by subordinate, 70 
Vaso-motor nerves, 70 
Veins, regulation of venous 
pressure by contraction 
of peripheral, 74 
Venous constriction, in rela- 
tion to COzg contents of 
blood, 74, 75 
Venous gas pressure, 71, 72 
regulation of, 72 
Venous pressure, effect on 
accelerator nerve, 73, 74 
in regulation of output 
from heart, 74 
regulation by COzg contents 
of blood, 74, 75 
regulation by passive con- 
gestion of capillaries, 75 
adrenal 
