308 



Mytilus sperm (Continued) 

 ionic gradients, 56 

 mitochondrial distribution, 287, 



288 

 pyrophosphate, effect of, 179 



Nagano, T., 151 



National Institutes of Health, 89 



Nebenkern, 113, 157 



enzyme concentration, 113 

 Nelson, L., 27, 171, 259, 265, 287, 



291, 293 

 Nerve 



acetylcholinesterase, 245 



conduction, 10, 55 



ionic exchange, 56 

 Newton, A. A., 19 

 Nine-plus-two fibrillar pattern, 23- 

 26, 148, 152, 159, 287 



mitotic centriole, relation to, 26 



significance, 9, 189, 287 



ubiquity, 148, 189,287 

 Noland, L. E., 220 

 Notonecta 



sperm activation, 290 

 Noyes, R. W., 171 

 Nucleotide, see individual com- 

 pound 

 Nutrient 



collection, 138, 144-146 



collection, by diffusion, 139 



collection, rate of, 137-139 



Octonoate-C 14 



substrate, 135 

 Olds, D., 62 

 Opossum sperm 



ultrastructure, 159 

 Optical envelope 



circular orbit, 4 



cylindrical, 147 



elliptical, 7, 147 



linear, 147 



rectangular, 3 



Oscillation 



algal flagellar mechanism, 276 



flagellar gel, 210 



insect fibrillar muscle mecha- 

 nism, 275-276 



myofibrils, 264 



oscillating protein, 291-292 



regulation by ionic shift, 265-266 



sperm flagellar models, 254, 262, 

 264 

 Osmometry, 63, 65 

 Osmotic regulation 



fertility, relation to, 65 



fructolysis, 66 



genital secretions, relation to, 63 



glycolysis, 65-66 



metabolic control, 59-75 



optimal conditions, 69 



oxygen consumption, 66 

 Outermost peripheral fibers 



axial filament complex, relation 

 to, 23, 166 



enzyme localization, 185, 287 



function, 23, 27, 152, 153, 161, 

 166, 173, 287 



reaction with antimyosin anti- 

 body, 185, 287 



reaction with muscle actin, 184 



ultrastructure, 152-155 

 Oviduct 



pH of secretions, 71 



sperm metabolism in secretions, 

 63 



sperm migration, 20 



sperm post-mortem, 59 

 Oxidative phosphorylation, 19, 99, 

 100, 173, 289; see also Respira- 

 tion; Uncoupling 



energy yield, 99, 129, 289 

 Oxygen consumption, see Respira- 

 tion 

 Oyster sperm 



dry weight, 1 13 



mitochondrial size, 112 



Z , value, 112 



