302 



SUBJECT INDEX 



Optic lobe, 24, 24, 25, 26, 26, 30 



ganglion in, 26 



terminal medulla of, 24, 25, 26, 

 28 

 Organiser, 2, 3, 4 

 Organisine, 3, 4, 5, 12 

 Ortho-dihydroxytryptamine, 59 

 Ortho-diphenol, 61 

 Osmoreceptors in hypothalamus, 



235, 239, 257 

 Osmotic concentration of urine, 239 

 Osmotic diuresis, 227 

 Osmotic gradient, 206, 231, 232, 



233 

 Osmotic pressure, 74, 221, 227, 



235, 237 

 Ovarian growth, 170 

 Ovary, 4, 150, 153, 157, 170, 182, 

 186 

 maturation, 245 

 Oviducal glands, 128ff., 129 

 Ovulation, 246 



Oxygen consumption, 167, 168ff., 

 169 {and see Respiration) 

 accompanying changes in fat 



storage, 186, 188 

 andTSH, 139 

 in Crustacea, 168, 178ff., 178, 



179, 180, 181 

 in Insecta, 138, 168ff., 171, 172, 



182ff., 191,250 

 in Protochordata, 173 

 in Vertebrata, 173ff., 175, 176, 

 185ff. 

 Oxyntic cells, 119 

 Oxytocin, 



and milk *'let-down", 65ff., 66, 



68, 130ff., 154, 159, 258 

 and muscles, 58, face 62, 64ff., 



65, 67, 152, 153, 157 

 and salt excretion, 208, 211, 214, 



218, 219, 254 

 and water balance in Amphibia, 



230 

 source of, 35ff. 



Palaemonetes , chromactivating hor- 

 mones, 

 and red pigment, PDH and 

 PLH,5,57,91ff.,92,95,i55 

 and white pigment, PWCH and 

 PWDH, 87, 95, 96 

 Pancreas, as endocrine gland, 44, 

 45,132, U2,\92>,\9^ {and see 

 Islets of Langerhans) 

 as exocrine gland, 1, 45, 117, 

 118, 120, 122ff., 123, 124ff., 

 125 

 transplantation of, 123, 123, 125, 

 125 

 Pancreatectomy, 193, 197 

 Pancreozymin, 46, 118, 120, 124, 



125, 125, 127, 156 

 Para-activators, 2, 73 

 Parabiotic graft, 69 

 Parasympathetic nervous system 



{see Nerves) 

 Parathormone, 



actions of, 8, 243, 246, 247, 250, 



251 

 means of control, 254, 256 

 secretion of, stimulated by dark- 

 ness, 246 

 source of, 46, 48, 49 

 Parathyroid glands, 49, 241 



and calcium, 241, 243, 244, 246 

 and phosphates, 250, 25 Iff. 

 cells of, 49 

 control by level of Ca and P in 



blood, 142, 254, 256 

 extirpation of, 246ff., 247 

 extract of, 246, 251 

 hypertrophy of, 252, 256 

 not under endocrinokinetic con- 

 trol, 132, 142 

 secretion stimulated by darkness, 



246 

 structure of, 46, 47, 48, 49 

 Parathyroidectomy, 246, 247 

 Paraventricular nucleus of hypo- 

 thalamus, 22, 33, 34, 35, 37 



