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Keywords: Gas exchange
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Journal Articles
J Exp Biol (2022) 225 (6): jeb243672.
Published: 16 March 2022
... of recurring aquatic hypoxia in its habitat. In normoxic water, A. gigas is reported to satisfy 70–80% of its O 2 requirement from the air while excreting 60–90% of its CO 2 to the water. If this pattern of gas exchange were to continue in severely hypoxic water, O 2 loss at the gills would be expected. We...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (22): jeb242364.
Published: 26 November 2021
.... Ionoregulatory hypothesis Oxygen hypothesis Gas exchange Metabolic rate Ionocytes Ontogeny Currently, there are two hypotheses explaining the first function of the developing teleost gill. The first, proposed by Krogh (1941) , suggests that gills develop to meet the O 2 demands of a developing fish...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (12): jeb216846.
Published: 25 June 2020
... . Respir. Physiol. Neurobiol.   161 , 298 - 305 . 10.1016/j.resp.2008.03.003 Boutilier , R. G. , Reed , J. Z. and Fedak , M. A. ( 2001 ). Unsteady-state gas exchange and storage in diving marine mammals: the harbor porpoise and gray seal . Am. J. Physiol.   281 , R490 - R494...
Journal Articles
J Exp Biol (2020) 223 (5): jeb219311.
Published: 5 March 2020
... to high vascularization (6.0 mm SVL). Functional, behavioral and morphological evidence suggests that double bubble-sucking increases the efficiency of pulmonary gas exchange by separating expired, deoxygenated air from freshly inspired air to prevent mixing. Hyla versicolor , and possibly other hylid...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (19): jeb185553.
Published: 5 October 2018
..., squid do not obtain oxygen across their skin to supply underlying tissues. Cutaneous respiration Cephalopod Metabolism Oxygen Ammonia Gas exchange Cutaneous oxygen uptake, the acquisition of O 2 molecules from the environment into the skin, is likely to occur to some extent in nearly...
Journal Articles
J Exp Biol (2018) 221 (14): jeb175752.
Published: 25 July 2018
...Hugh S. Winwood-Smith; Craig R. White ABSTRACT Metabolic rate is commonly estimated from rates of gas exchange. An underappreciated factor that can influence estimates is patterns of pulmonary respiration. Amphibians display discontinuous respiratory patterns, often including long apnoeas...
Journal Articles
J Exp Biol (2018) 221 (12): jeb176024.
Published: 21 June 2018
...Lutz Thilo Wasserthal; Peter Cloetens; Rainer H. Fink; Lennard Knut Wasserthal ABSTRACT Following the discovery of flight motor-driven unidirectional gas exchange with rising P O 2 in the blowfly, X-ray computed tomography (CT) was used to visualize the organization of the tracheal system...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (4): 531–536.
Published: 15 February 2017
.... 12 9 2016 6 12 2016 © 2017. Published by The Company of Biologists Ltd 2017 http://www.biologists.com/user-licence-1-1/ Summary: Shunting in reptiles is ineffective for regulating gastric CO 2 supply but effectively reduces blood O 2 levels. Gas exchange Heart...
Journal Articles
J Exp Biol (2016) 219 (23): 3810–3821.
Published: 1 December 2016
... exposure to hypoxia or hypercapnia. Gas exchange transients were evaluated in reference to predictions from a two-compartment model of CO 2 exchange to quantify the effects of the levels of hypoxia and hypercapnia, duration of hypercapnia (30–300 min) and body temperature (23 versus 33°C). For hypercapnia...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (21): 3478–3486.
Published: 1 November 2015
... assumed that the backswimmer air store does not act as a gas gill and that gas exchange with the water is negligible. This study combines measurements of dive characteristics under different exotic gases (N 2 , He, SF 6 , CO) with mathematical modelling, to show that the air store of the backswimmer...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (13): 1986–1989.
Published: 1 July 2015
.... destructans infection could cause disruption to passive gas-exchange pathways across the wing membranes, thereby causing a compensatory increase in water-intensive pulmonary respiration. We hypothesized that total evaporative water loss would be greater when passive gas exchange was inhibited. We found...
Journal Articles
J Exp Biol (2015) 218 (14): 2201–2210.
Published: 1 July 2015
...Lutz T. Wasserthal ABSTRACT It is widely accepted that an efficient oxygen supply and removal of CO 2 in small flying insects are sufficiently performed by diffusion with open spiracles. This paper shows that in the tethered flying blowfly, gas exchange occurs by autoventilation and unidirectional...
Journal Articles
J Exp Biol (2011) 214 (18): 3062–3073.
Published: 15 September 2011
... hyperventilation, or where ambient hypercapnia is in excess of haemolymph (>1% CO 2 ). In contrast, intratracheal O 2 levels fluctuated widely, but on average remained above 15% in normoxic (21% O 2 ) atmospheres. Decapitation caused the cockroaches to display discontinuous gas exchange cycles (DGCs...
Journal Articles
J Exp Biol (2011) 214 (13): 2175–2181.
Published: 1 July 2011
... . Hebets E. A. , Chapman R. F. ( 2000 ). Surviving the flood: plastron respiration in the non-tracheate arthropod Phrynus marginemaculatus (Amblypygi: Arachnida) . J. Insect Physiol. 46 , 13 - 19 . Hetz S. K. ( 2007 ). The role of the spiracles in gas exchange during development...
Journal Articles
J Exp Biol (2009) 212 (20): 3296–3304.
Published: 15 October 2009
... tracheal branches. The insect respiratory organ, the tracheal system, carries out one of the more unusual modes of gas exchange: it connects ambient gases essentially to every cell or group of cells in the organism via branching,air-filled tubes ( Wigglesworth,1983 ). Because respiratory gases...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2008) 211 (23): 3759–3763.
Published: 1 December 2008
... blood returning from the lungs). By contrast, a large net right-to-left (R–L) shunt (pulmonary bypass) normally prevails during apnoea. The cardio–respiratory interaction and the changes in cardiac shunting have been suggested to improve pulmonary gas exchange but the benefits of L–R shunting...
Journal Articles
J Exp Biol (2008) 211 (21): 3409–3420.
Published: 1 November 2008
..., but the ultimate physiological significance of this phenomenon in gas exchange has not been determined. Possible functions of this mechanism include to convectively transport air within or out of the body, to increase the local pressure within the tracheae,or some combination thereof. To determine whether tracheal...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2006) 209 (9): 1603–1611.
Published: 1 May 2006
...Emilie M. Gray; Timothy J. Bradley SUMMARY In this paper we demonstrate that the apparent pattern of gas exchange in insects, as observed using flow-through respirometry, is strongly affected by the rate of flow of air through the system. This is true not only because of the time constant...
Journal Articles
J Exp Biol (2006) 209 (9): 1662–1677.
Published: 1 May 2006
...Nicole Heymann; Fritz-Olaf Lehmann SUMMARY During elevated locomotor activity such as flight, Drosophila satisfies its increased respiratory demands by increasing the total spiracle opening area of the tracheal gas exchange system. It has been assumed that in a diffusion-based system, each spiracle...
Journal Articles
J Exp Biol (2006) 209 (5): 938–944.
Published: 1 March 2006
... The Company of Biologists Limited 2006 2006 monotreme burrowing respiration gas exchange oxygen consumption echidna Short-beaked echidnas ( Tachyglossus aculeatus ) are famous for many unusual characteristics, among them the ability to avoid capture or predation by `sinking' into the soil...