308 



SUBJECT INDEX 



Tetrapoda, face 22, 33, 36, 40, 46, 

 47,49, 50, 51, 5i, 67 {see also 

 Amphibia, Reptilia, Aves and 

 Mammalia) 

 Thiouracil, 141 

 Thiourea, 233 

 Thirst, 37, 207, 239 

 Thoracic ganglia, 24, 30 

 Threshold, levels of sensitivity, 

 154 

 values for hormone action, 249 

 values for hormone stimulation, 

 256 

 Thymus gland, 47, 48 

 Thyroglobulin, 140 

 Thyroid gland, 



andblood-P, 247, 243, 244 



as source of thyroxine, 46, 47ff., 



face 48(a), 48 

 cells of, 48ff., face 140, face 141 

 endocrinokinetic control of, 133, 

 139ff., face 140, face 141, 

 255, 256 {and see TSH) 

 extracts of, 174, 175, 176 

 in Agnatha, 173ff. 

 in Amphibia, 140, 174ff. 

 in Aves, 177 

 in fish, 139, 174, 189, 208, 213fT., 



227, 244 

 in hibernation, 186 

 in Mammalia, 140, 175, 176, 177, 

 187, 188ff., 194, 208, 241, 

 243 

 in Protochordata, 173 

 morphogenetic effects of secre- 

 tion, 8, 12, 140, 257, 259 

 Thyroidectomy, difficulty of, 174, 

 177 

 effect on blood-P, 250 

 Thyrotropin, TSH, 



and iodine metabolism, 140ff. 

 and parathyroid glands, 243, 245, 



246, 256ff. 

 control of secretion of, 141, 149, 

 157, 161 



endocrinokinetic^ action of, 12, 



49, 133, 139ff., face 140, face 



141,174,177,187,188,213, 



255, 259 

 growth-promoting action of, 10, 



142 

 source of, 22, 43, 44 

 Thyroxine, action of, 169 

 in Amphibia, 175, 259 

 in Chordata, 70, 169, 173, 187, 



188ff., 208, 243 

 in fish, 215, 227 



in Mammalia, 176, 177, 195, 250 

 Thyroxine, and cretinism, 1 



and cycle of iodine metabolism, 



140ff. 

 and feed-back, 141, 157 

 and metamorphosis, 8, 12, 259 

 and parathyroids, 243, 256 

 precursors of, 49, 140, 141 

 secretion stimulated by TSH, 



133, 139flf., 255 

 source of, 46, 47, face 48 {a) 

 Tissues, 



and sugar supply, 189, 195, 



197flF., 253 

 embryonic, 182, 184 

 enzymes of, 140 

 hormone breakdow^n in, 59, 91, 



140, 155, 184 

 iodine cycle in, 140 

 permeability changes in, 220, 



225, 228fT. 

 protein synthesis in, 190, 249 



{and see Protein) 

 protection from diapause, 184ff. 

 salt content of, 206, 207, 215 

 water content of, 206, 226ff., 230, 



237, 239 

 Translocation, of calcium and 

 phosphates, 250 

 of fats, 255 

 Tritocerebral, commissures, 24, 28, 

 29, 80,90,91,92,94 

 lobe, 25 



