872 



Index 



Fish, uricolytic enzymes in, 204, 205 

 vibration sense in, 507 

 visual field in, 402 

 Flagella, 640. See also Cilia. 

 Flagellates, carbon requirements in, 114 

 cellulose digestion in, 172 

 photoreceptors in, 383 

 thiamine requirements in, 123 

 Flatworms, brain in, 816 



cholinergic neuromuscular systems in, 



614 

 conditioned responses in, 844 

 locomotion in, 816 

 nervous system in, 810 

 ocelh in, 384 

 osmoregulation in, 35 

 Flavone glycosides, 130 

 Flicker fusion frequency, 415 



explanation of, 418, 419 

 Flight, in insects, orientation during, 523 

 oxygen consumption during, 238 

 respiration during, 261 

 respiratory quotient and, 276 

 Fluid(s), body, before and after dialysis 

 against sea water, 90, 91 

 circulation of, 531-575 



summary, 567 

 distribution of pigments in, 290-293 

 hydrogen ion concentration of, 80, 81 

 in elasmobranchs, 51 

 in Pheretima posthuma, 37 

 ions in, 75 



in relation to external media, 77 

 responses to alterations in medium, 

 84-90 

 respiratory functions of, 290-340 

 coelomic, protein concentration in, 104 

 digestive, hydrogen ion concentration of, 

 151-155 

 stimulation of secretion, 155 

 mechanisms for ingesting, 146 

 Fluid balance, maintenance of, endocrine 



influences, 760 

 Fly, olfactory pit in, 45 1 

 Folic acid, 128 

 Follicle-stimulating hormone, 741, 747, 



750 

 Food, digestion of. See Digestion. 



inactive, swallowing mechanisms for, 



146 

 movement in alimentary tract, 149 

 orientation to, 449 

 particulate, mechanisms for dealing 



with, 145 

 retention in alimentary tract, 149 

 soluble, absorption of, 144 

 vacuoles in protozoa, 150, 155 

 Forebrain, functions of, 834 

 Fovea centralis, 396 

 Freezing, 343 



Freezing point, measurement of, 7 



sodivun chloride and, 7 

 Frequency discrimination in man, 478 

 Frequency, flicker fusion, 415 

 Frogs, cerebellum in, 832 



cutaneous vs. pulmonary respiration in, 

 212 



digestive secretion in, 156 



forebrain in, 836 



heart in, electrical stimulation of, 566 



kidney in, 54, 55 



mechanoreception in, 510 



muscle in, 578, 588 



muscle contractions in, 593 



muscle responses in, 596 



optic nerve fibers in, 430 



osmoregulation in, 52 



phonoreception in, 488 



respiratory control in, 257 



temperature relations of, 351 

 FSH, 741, 747, 750 

 Fructosidase, /3-, distribution of, 175 

 Fructosides, 169 

 Fundulus, color changes in, 707, 710 



eggs of, osmoregulation in, 19 



lateral line nerve responses in, 507 



osmoregulation in, 49 



xanthophores in, 711 

 Fur in temperature regulation, 367, 368 



Galactogen, 748 

 Galactosidases, distribution of, 175 

 Galactosides, 169 

 Gammarus, blood chloride in, 87, 88 



oxygen consimiption in, 32 

 Ganglia, potentials in, 797 

 Gas bladder, 218 



Gases, partial pressures in dry air, 210 

 Gastrin, 156, 762 

 Gastrointestinal hormones, 762 

 Gastrointestinal tract, muscles of, 605 

 Gastropods, blood and oxygen capacity in, 

 304 



ganglionic reflexes in, 815 



nitrogen excretion in, 198 



oxygen transport in, 326 



oxygen withdrawal by, 251 

 Geese, respiratory quotients of, 276 

 Gelation in amoebae, 636 

 Gel-sol ratio, amoeboid movement and, 636 

 Gene hormones, 729 

 Geotaxis, 515 



negative, 516 



positive, 515 

 Giant nerve fiber systems, 786 

 Gills, in crustaceans, 214 



in marine fish, 49 



respiration by, 213 

 Girella, temperature reactions in, 350 

 Globulin, serum, molecular size, 105 



