Index 



873 



Glomerulus in amphibia, 54 



in marine fish, 48 

 Glucose, a and /3, structure of, 168 

 Glucosidase, /3-, 173 

 Glucosidases, distribution of, 175 

 Glucosides, 1 69 



Glutamic acid, structural formula, 119 

 Glycine, structural formula, 119 

 Glycogen as energy source, 269 



digestion of, 169, 173 

 Glycolysis, 268 



pathway of, 270 

 Glycosidases, distribution of, 174-176 

 Glycosides, classification of, 169 

 Goat, oxygen dissociation curves in, 320 

 Goldfish, acclimatization of, 347, 348 



oxygen consumption in, 241 



spinal reflexes in, 824 

 Gonadotropin, chorionic, 741 

 Gonadotropins, 741 

 Gonads, hormones of, 742 

 Grasshopper, electrocardiogram of, 556 



fat metabolism in, hormones and, 759 



respiration in, 264 

 Gravity, orientation to, 515 



receptors, 514 

 Gregarines, movement in, 638 

 Growth and differentiation, hormones and, 

 726-740 



essential salts for, 94 



hormones and, in vertebrates, 726 

 Gryllus, phonoreception in, 498 

 Guanine, excretion of, 189 

 Guanophores, control of, 711 

 Gunda ulvae, osmoregulation in, 18 

 Gustation. See Taste. 



Habitat, oxygen consumption and, 239 



Hair sensilla as phonoreceptors, 497 



Halteres, 523 



Hamsters, hibernation in, 372, 373 



Hare, varying, color changes in, 766 



Harmonics, 472 



Hearing, place theoiy of, 479 



range of, 478 



See also Phonoreception. 

 HeartCs), ampullar, 545 



chambered, 542 



cholinergic mechanisms in regulation of, 

 546, 548 



cycle in, 543 



direct responses of, 559-567 



effects of drugs on, 559 



effects of salts on, 562 



lymph, 551 



muscle, effects of electrical stimulation 

 on, 565 



myogenic, 546 



nervous regulation of, 557 



neurogenic, 547 



Heart, physiology of, 542-559 



pulsating vessel type, 545 



rates, 552 



slowing of, in diving, 260 



tubular, 544 



types of, 542 

 Heat, adaptation to, 241 



conductivity of water, 342 



lethal effects of, 346 



production of, 241 

 in homojotherms, 370 



receptors for, 364 

 Helicorubin, 294 



absorption spectrum of, 300 

 Helix, electrocardiogram from, 555 



muscle action potentials from, 590 



osmoregulation in, 36 

 Helminths, parasitic, osmoregulation in, 17 

 Hemagglutinogens, 106 

 Hematin as dietary essential, 131 

 Heme, structural formula of, 297 

 Hemerythrin, 291, 293, 302, 303 



absorption spectrum of, 300 



oxygen transport by, 325 

 Hemicellulose, digestion of, 173 

 Hemochromogens, 294 

 Hemocoel, 531 

 Hemocyanin, 292, 293, 303, 304 



absorption spectra of, 300 



buffering capacity of, 333 



dissociation rates of, 298 



oxygen dissociation curves in Limulus, 

 328 



oxygen transport by, 326 

 Hemoglobin, absorption spectra of, 297, 

 299 



chemical composition, 294 



content of blood, 295 



crystal structure of, 105 



dissociation rates of, 298 



distribution of, 290, 291 



in diving mammals, 259 



in embryos, 313, 320 



in invertebrates, 320 



molecular size of, 298 



oxygen dissociation curves of, 306 



oxygen tension and, 248 



oxygen transport by, 306-325 



sedimentation rates of, 301 



tissue, 292 

 Hemolysis, time required for, 109 

 Herbivores, digestive enzymes in, 179 

 Hering-Breuer reflex, 254, 255 

 Heterotherms, temperature relations in, 



361 

 Heterotrophic organisms, 113 

 Hibernation, 371 

 Hippuric acid, excretion of, 189 

 Hirudinea, osmoregulation in, 36 

 Histidine, structural formula, 119 



