Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 24
... shock , or a chemical irritant , the muscle will give a single contraction in response to every stimulation . And it is this readiness of organic tissues to respond to a suitable stimulus that physiologists designate by the term ...
... shock , or a chemical irritant , the muscle will give a single contraction in response to every stimulation . And it is this readiness of organic tissues to respond to a suitable stimulus that physiologists designate by the term ...
Pagina 32
... shock . On the other hand , if the specimen operated upon be one which is in a fresh and vigorous state , its period of quiescence will probably be but short ; the nervous shock , if we may so term it , although evidently considerable ...
... shock . On the other hand , if the specimen operated upon be one which is in a fresh and vigorous state , its period of quiescence will probably be but short ; the nervous shock , if we may so term it , although evidently considerable ...
Pagina 42
... shock , and began to swim about with tolerable vigour . I now darkened the room , and threw the concentrated beam of light into the water as before . The difference in the behaviour of the mutilated and of the unmutilated specimens was ...
... shock , and began to swim about with tolerable vigour . I now darkened the room , and threw the concentrated beam of light into the water as before . The difference in the behaviour of the mutilated and of the unmutilated specimens was ...
Pagina 45
... shock , and , lastly , proceeded to throw in single flashes of light of measured duration . I found that unless the flash of light was of slightly more than one second in its duration , no response was given ; that is to say , the ...
... shock , and , lastly , proceeded to throw in single flashes of light of measured duration . I found that unless the flash of light was of slightly more than one second in its duration , no response was given ; that is to say , the ...
Pagina 47
... shocks of graduated strength showed that certain parts or tracts of the nectocalyx are more sensitive than others . The most ... shock ; and exhaustion super- venes under the influence of prolonged excitation , Moreover , EXPERIMENTS IN ...
... shocks of graduated strength showed that certain parts or tracts of the nectocalyx are more sensitive than others . The most ... shock ; and exhaustion super- venes under the influence of prolonged excitation , Moreover , EXPERIMENTS IN ...
Termeni și expresii frecvente
able ambulacral feet artificial rhythm Aurelia aurita become bell blocked brium cause ceased chloroform co-ordination continue contractile strip contractile tissue contraction contraction-waves covered-eyed Medusa crawling curare diastole direction discharge Echinoderm Echinodermata Echinus effect excising excitable tissues experiments fact feeble fibres forceps fresh water function ganglionic glycerine hour Illustrations induction shocks influence instance intervals irritability jelly-fish latter lithocyst locomotor centres manubrium marginal bodies marginal ganglia minutes movements muscle muscular mutilated naked-eyed Medusa natural rhythm nectocalyx nerve nerve-cells nerve-centre nerve-fibres nerve-ring nerve-trunks nervous network nervous system normal sea-water observed occur organ paralyzed pass pedicellariæ pedicels period of latent physiological plexus poison portion prepotent Professor pulsations radial tubes rays reflex reflex action removed response Sarsia seconds segments spasm species specimens spines spontaneity Star-fish strychnia suckers surface swimming motions swimming-bell systole tank temperature tentacles tentacular tetanus Tiaropsis indicans tion umbrella unmutilated animal wave whole