Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 44
... influence prior to origi- nating a discharge , or to an immensely lengthened period of latent stimulation manifested by the ganglia under the influence of light . * This is an * The period of latent stimulation merely means the time ...
... influence prior to origi- nating a discharge , or to an immensely lengthened period of latent stimulation manifested by the ganglia under the influence of light . * This is an * The period of latent stimulation merely means the time ...
Pagina 45
... influence was taking place in the ganglia , which required somewhat more represent the time during which the series of physiological pro- cesses are taking place in response to an adequate stimulus , or does it represent the time during ...
... influence was taking place in the ganglia , which required somewhat more represent the time during which the series of physiological pro- cesses are taking place in response to an adequate stimulus , or does it represent the time during ...
Pagina 46
... influence is necessary in order to admit of the summating influence of its vibrations on the molecules , so in the case of this ganglionic material , the decom- position which is effected in it by light , and which terminates in an ...
... influence is necessary in order to admit of the summating influence of its vibrations on the molecules , so in the case of this ganglionic material , the decom- position which is effected in it by light , and which terminates in an ...
Pagina 47
... influence . Electrical Stimulation . All the excitable parts of all the Medusa which I have examined are highly sensitive to electrical stimulation , both of the constant and of the induced current . Exploration with needle - point ...
... influence . Electrical Stimulation . All the excitable parts of all the Medusa which I have examined are highly sensitive to electrical stimulation , both of the constant and of the induced current . Exploration with needle - point ...
Pagina 48
George John Romanes. venes under the influence of prolonged excitation , Moreover , I have obtained evidence of that polariza- tion of nerve - tissues under the influence of the constant current , which is known to physiologists by the ...
George John Romanes. venes under the influence of prolonged excitation , Moreover , I have obtained evidence of that polariza- tion of nerve - tissues under the influence of the constant current , which is known to physiologists by the ...
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