Respiration physiology
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Respiration physiology · Nov 1980
Discharge of intrapulmonary chemoreceptors and its modulation by rapid F1CO2 changes in decerebrate ducks.
Single-unit activity was recorded from intrapulmonary chemoreceptors (IPC) in decerebrate ducks inspiring room air (fresh air or control breath), or a short pulse of room air preceded and followed by 5% CO2 (fresh air pulse or experimental breath). Of 36 IPC studied, 28 fired a burst of impulses of similar duration to the fresh air pulse; delaying the fresh air pulse until later and later in inspiration progressively delayed the IPC burst. The remaining 8 IPC did not respond discretely to the fresh air pulse, rather their discharge was reduced diffusely in one or both of the ventilatory phases. ⋯ Am. J. Physiol. 237: R260-R265)].