Researches Upon the Venoms of Poisonous Serpents, Volume 26

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Smithsonian Institution, 1886 - 186 pagine
 

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Pagina 162 - THE THANATOPHIDIA OF INDIA; being a Description of the Venomous Snakes of the Indian Peninsula. With an Account of the Influence of their Poison on Life, and a Series of Experiments.
Pagina 154 - ... in destroying the coagulability of the blood, in modifying the red blood corpuscles, and in the production of molecular changes in the capillary walls ; their action on the accelerator centres of the heart is more notable than that of the peptone, hence they are more active in causing the increased pulse rate ; they exert, too, a more marked action on .the vasomotor centres in producing the primary fall of pressure, and are the greater depressants of the heart ; they also act more powerfully...
Pagina 154 - ... corpuscles to perform their functions. There can be no question, however, that the respiratory centres are the parts of the system most vulnerable to venom, and that death is commonly due to their paralysis.
Pagina 158 - An account of the most effectual means of preventing the deleterious consequences of the bite of the crotalus horridus, or rattle-snake.
Pagina 170 - Crotalus horridus: its analogy to yellow fever, malignant, bilious, and remittent fevers. Demonstrated by the action of the venom on man and animals. With an account of Humboldt's prophylactic inoculation of the venom of a serpent, at Havana, Cuba.
Pagina 154 - ... by irritating the capillaries, and are the principal factor in exciting the peripheries of the vagi nerves in the production of the increased respiration rate.
Pagina 153 - XX.— 33 depression of the vasomotor centres, depression of the heart, and irritation and consequent constriction of the capillaries. The increased activity of the accelerator centres and the direct toxic action of the venom upon the heart are the two antagonistic factors in determining the pulse rate.
Pagina 155 - ... may be available after the absorption of the poison lies clearly in the direction of a physiological antagonist, or, in other words, of a substance which will oppose the actions of venom upon the most vulnerable parts of the system. The activities of venoms are, however, manifested in such diverse ways and so profoundly and rapidly that it does not seem probable that we shall ever discover an agent which will be capable at the same time of acting efficiently in counteracting all the terrible...
Pagina 154 - ... they exert, too, a more marked action on the vasomotor centres in producing the primary fall of pressure and are the greater depressants of the heart ; they also act more powerfully upon the respiratory centres to paralyze them. The peptones are more active in the production of oedema, in the breaking down of the tissues, in the production of putrefaction and sloughing ; they have little power to produce ecchymoses, to prevent coagulation or modify the capillary walls or the blood-corpuscles;...

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