864 



Index 



Amino acids, in various animals, 192-196 



growth of Euglena in, 116 

 Aminopeptidases, 159 

 Ammonia, excretion of, 187, 189, 191 

 in fish, 197 



in various animals, 192-196 

 Ammonotelic animals, 191 

 Amoeba, cell forms of, 631 



efficiency of contractile vacuole in, 46 



fluid excretion in, 41 



mechanism of filling contractile vacuole 

 in, 45 



light sensitivity in, 382 



osmotic adaptation in, 38, 39, 40 



permeability in, 39 

 Amoeboid movement, 630-639 

 theories of, 634 

 types of cells in, 630 

 Amphibians, chemoreception in, 456 



chromatophores in, 703 



conditioned responses in, 845 



digestive secretion in, 157 



erythrocytes in, 295 



forebrain in, 836 



gills in, 216 



heart in, 544, 551 



hemoglobin content in, 295 



hormones and growth in, 728 



kidney in, 48 



nerve conduction in, 784 



nitrogen excretion in, 195, 198 



osmoregulation in, 52-55 



oxygen dissociation curves for, 314, 321 



phonoreception in, 487 



respiratory characteristics of blood of, 

 307 



respiratory responses in, 266 



serologic relationships in, 107, 108 



spinal reflexes in, 825 



temperature relations of, 351 



uricolytic enzymes in, 204, 205 



water loss in, 54 

 Amphioxus, gills in, 215 

 Amylase, distribution of, 170 

 Anaerobic metabolism in diving, 259 

 Anaerobiosis, 268, 271-274 



degrees of, 272 



oxygen utilization in, 272 

 Anchistioides, eye pigment migration in, 



388 

 Androgens, 743 

 Anelectrotonus, 780 

 Anemia, macrocytic, 129 

 Anemone, muscle responses in, 594 

 Anetnonia, nematocysts in, 657 

 Anemotaxis, 509 

 Angle, visual, 399 



Anguilla vulgaris, osmoregulation in, 50 

 Animal kingdom, phylogenetic tree, 4 

 Annehds, blood pressure in, 539 



Annelids, brain in, 816 

 chemoreception in, 450 

 cholinergic systems in muscles in, 610, 



612 

 chromatophores in, 688 

 conditioned responses in, 844 

 ganglionic reflexes in, 812 

 heart in, 545, 551 

 ions in body fluids in, 82 

 light sensitivity in, 383 

 luminescence in, 663 

 nerve conduction in, 785 

 nervous regulation of heart in, 559 

 nervous system in, 810 

 nitrogen excretion in, 192 

 ocelli in, 384 

 oxygen supply of, 211 

 oxygen withdrawal by, 251 

 pH of digestive organs, 152 

 protein in coelomic fluids in, 104 

 proteinases of, 160 

 respiratory responses in, 265 

 Anobiidae, cellulose digestion in, 172 

 Anodonta, cilia in, 648 



osmoregulation in, 35, 36 

 Anolis, chromatophores in, 681 



color changes in, 712 

 Ant, light orientation in, 393 

 Antigens, 106 



Aphrophora spumaria, ocellus of, 392 

 Aplysia, ionic regulation in, 89 



osmotic adjustment in, 12, 13 

 Arachnoids, oxygen transport in, 326 

 Arbacia, eggs of, volume changes in rela- 

 tion to tonicity of sea water, 10, 11 

 pustulosa, chromatophores in, 689 

 Archicortex, 835 

 Area centralis, 396 



Arenicola, eSect of acetylchohne on heart 

 of, 560 

 heart in, 545 



hemoglobin function in, 324 

 osmotic adjustment in, 12 

 stomatogastric nerve plexus in, 607 

 Arginase, distribution of, 201 

 Arginine, structural formula, 1 1 8 

 Arginine phosphate. See Phosphoarginine. 

 Arrhenius ft, 343 

 Anemia, osmoregulation in, 32 

 Arthropods, blood picssure in, 539 

 brain in, 818 



portions occupied by different regions, 

 819 

 chemoreception in, 450 

 compound eye in, 387 

 conditioned responses in, 845 

 electrocardiograms in, 555 

 exopeptidases in, 166 

 fat digestion in, 177 

 ganghonic reflexes in, 814 



