ESSENTIALS OF PHYSIOLOGY. 



Nerve impulse, 35. 



electrical changes, 35. 



excitatory condition, 34. 



influence of drugs on, 37. 

 of temperature on, 37. 



propagated disturbance, 35. 



velocity of, 36. 



Nervi erigentes, 99, 228, 335, 398. 

 Nervous system, 39. 

 Neurolemina, 33. 

 Neurofibrillar network, 41. 



continuity of, 41. 

 Neurogenic theory, 210. 

 Neuroglia, 40. 

 Neuron, 40. 



Neutrophile leucocytes, 156. 

 Nicotine, effect on heart, 224. 



on synapse, 101. 

 Ninth nerve, nucleus of, 67. 

 Nissl's granules, 40. 

 Nitrogen, endogenous, in urine, 357. 



estimation, 384. 



excretion in starvation, 361. 



exogenous, in urine, 357. 



in protein, 8. 



output, 357. 



requirements of body, 373. 

 Nitrogenous constituents of urine, 382. 



equilibrium, 361. 

 Nociceptive stimuli, 59. 

 Nodal point, 121. 

 Nuclease, 359. 

 Nuclei pontis, 70. 

 Nucleic acid, 3, 11, 359. 

 Nuclein, 11, 359. 



metabolism of, 359. 

 Nucleoprotein, 11. 



digestion of, 11, 304, 359. 

 Nucleus, 2. 



ambiguus, 67, 68. 



caudatus, 94. 



cuneatus, 68. 



Deiters', 70. 



dentatus, 71. 



emboliformis, 71. 



fastigii, 71. 



globosus, 71. 



gracilis, 68. 



lenticularis, 94. 



Occipital lobe, 90. 

 Occipito-frontal fasciculus, 84. 

 Oculo-motor nucleus, 67, 79, 126. 

 Odours, 1.13. 

 (Esophagus, 300. 



in deglutition, 300. 

 CEstrus, 413. 

 Oleic acid, 7. 

 Olfactometer, 113. 

 Olfactory apparatus, 92. 



area, 92. 



glomeruli, 92. 



Olfactory lobe, 92. 



mucous membrane, 113. 



sensations, 113. 



tract, 92. 

 Olive, 68. 



Olivo-cerebellar fibres, 73. 

 Olivo-spinal tract, 53. 

 Oncometer, 225. 

 Optic chiasma, 90. 



decussation, 90. 



disc, 118. 



nerve, efferent fibres in, 118. 



radiation, 83, 90. 



tract, 90. 

 Optical axis of lens, 121. 



centre of lens, 121. 



defects of eye, 126. 



illusions, 140. 

 Optimum temperature for ferments, 



288. 



Optograms, 130. 

 Ora serrata, 116, 118. 

 Organ of Corti, 144. 

 Organic compounds in body, 4. 

 Osazones, 6. 

 Osmometer, 15. 

 Osmosis, 14, 241. 

 Osmotic pressure, 14. 



freezing-point method, 15. 



measurement of, 15. 



of colloids, 16. 



of electrolytes, 15. 



of plasma, 167. 



of proteins, 242, 392. 

 Osseous labyrinth, 143. 

 Otic ganglion, 297. 

 Otoliths, 152. 



function of, 153. 

 Outer cell lamina, 81. 



fibre lamina, 81. 

 Overtones, 146. 

 Ovulation, 411. 

 Ovum, 411. 



maturation of, 413. 

 Oxalate crystals, 387. 



plasma, 171. 

 Oxidases, 290. 

 Oxyacids, 355, 364. 

 Oxygen, avidity of tissues for, 281. 



capacity of blood, 252. 



effect of changes in tension of, 268. 



exchange in lungs, 261. 



lack, in asphyxia, 270. 



production of lactic acid in, 268. 



tension in alveoli, 261. 



in blood, 255, 268. 

 Oxy haemoglobin, 159, 256. 



absorption spectrum of, 159. 



dissociation of, 256. 



influence of acids on, 258. 

 of temperature on, 258. 



reduction of, 159. 

 Oxyproline, 12, 13. 



