PMID: 1197944Jun 11, 1975Paper

Kinetics of inert gas equilibration in an exclusively skin-breathing salamander, Desmognathus fuscus

Respiration Physiology
R N GatzJ Piiper

Abstract

Characteristics of cutaneous gas exchange in amphibians were studied by analysis of the equilibration kinetics of an inert test gas in salamanders which have neither lungs nor gills. Specimens of the common dusky salamander (Desmognathus fuscus, Plethodontidae, Urodela), average body mass 6.1 g were equilibrated with 20% chlorodifluoromethane (Freon 22) in oxygen. The time course of subsequent elimination of Freon 22 into atmospheric air was more rapid in living than in dead animals. This difference was attributed to convective transport by blood flow. Several alternative models were proposed, providing a basis for quantitative analysis of the data. All models yielded similar values for convective conductance due to blood flow. In order to calculate blood flow therefrom, a simplified circulation model based on anatomical evidence was used: the cardiac output is in part directed to the skin, subserving gas exchange with the environment, and in part to the internal organs; the blood returning from both skin and internal organs is mixed before reaching the heart. Depending on assumptions regarding the model and the partitioning of blood flow to the skin and to internal organs, the following range of values was calculated from the ...Continue Reading

References

Oct 1, 1973·Comparative Biochemistry and Physiology. A, Comparative Physiology·R W Guimond, V H Hutchison
Jun 1, 1972·Comparative Biochemistry and Physiology. A, Comparative Physiology·R W Guimond, V H Hutchison
Dec 1, 1971·Respiration Physiology·J PiiperH Rahn

❮ Previous
Next ❯

Citations

May 1, 2012·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Casey A Mueller, Roger S Seymour
Mar 1, 1975·Respiration Physiology·J Piiper, P Scheid
Nov 1, 1978·Respiration Physiology·G Nonnotte, R Kirsch
Aug 2, 2003·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Donald C Jackson, Sarah F Denniston
Feb 1, 1985·Biological Reviews of the Cambridge Philosophical Society·M E Feder, W W Burggren
Sep 8, 2011·Physiological and Biochemical Zoology : PBZ·Casey A Mueller, Roger S Seymour
Jun 11, 2010·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Donald C Jackson, Gordon R Ultsch
Aug 4, 2004·Respiratory Physiology & Neurobiology·Donald C Jackson
Mar 20, 2020·Evolution; International Journal of Organic Evolution·Vincent R FaralloDonald B Miles

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.