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- W1968909970 abstract "Abstract Ventilation was recorded by pneumotachography in lightly anesthetized tortoises Testudo horsfieldi , placed at 25, 30 or 35 °C and breathing air or an hypoxic mixture containing 10 or 5% O 2 . Hypoxic tortoises hyperventilated. In these nine environmental conditions the animals were switched onto pure oxygen for one tidal volume. In normoxic tortoises at 35 °C and in all hypoxic animals, this led to a transient fall of ventilation, a response abolished by cutting both vagus nerves. The injection of NaCN-containing saline into one of the main vessels from the cardiac ventricle led to a transient increase of ventilation in tortoises breathing air, a response absent in animals breathing pure oxygen. By comparing the delay and the magnitude of the ventilatory reaction to injection of small doses of NaCN in the right or left aortic arches, or in the right or left pulmonary arteries, it appears probable that the putative chemoreceptor structures are perfused by blood of both pulmonary arteries. In conclusion , ventilatory chemoreflexes exist in the tortoise, Testudo horsfieldi ; the chemoreceptor structures are presumably perfused by the pulmonary arteries and innervated by branches of the right and left vagus nerves." @default.
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- W1968909970 date "1977-11-01" @default.
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- W1968909970 title "Ventilatory chemoreflex drive in the tortoise, Testudo horsfieldi" @default.
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- W1968909970 doi "https://doi.org/10.1016/0034-5687(77)90101-3" @default.
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