The permeability of the skin of the aquatic anuran Xenopus laevis (Pipidae).

T. Yorio, P. J. Bentley

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Abstract

The undirectional transcutaneous fluxes of Na, Cl, water and urea were measured, in vitro, in the pipoid anuran Xenopus laevis. An active uptake (outside to inside) of Na was observed but Cl movements appeared to be passive. The effluxes of Na and Cl were low compared to those measured in other species of amphibians. The active Na transport was less than that of more terrestrial species and, although it could be stimulated by vasotocin, aldosterone was ineffective. The permeability of the skin to water was also low and although it was increased in the presence of vasotocin the magnitude of the response was much less than seen in more terrestrial anurans. The skin was permeable to urea but the movement of this solute was not remarkable when compared to that in other amphibians. These properties of the skin are discussed in relation to the animal's aquatic manner of life.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalJournal of Experimental Biology
Volume72
StatePublished - 1 Feb 1978

Fingerprint

Pipidae
Xenopus laevis
vasotocin
skin (animal)
Vasotocin
Permeability
skin
permeability
Amphibians
amphibian
Skin
urea
Urea
amphibians
aldosterone
Water
Active Biological Transport
aquatic organisms
Aldosterone
solute

Cite this

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abstract = "The undirectional transcutaneous fluxes of Na, Cl, water and urea were measured, in vitro, in the pipoid anuran Xenopus laevis. An active uptake (outside to inside) of Na was observed but Cl movements appeared to be passive. The effluxes of Na and Cl were low compared to those measured in other species of amphibians. The active Na transport was less than that of more terrestrial species and, although it could be stimulated by vasotocin, aldosterone was ineffective. The permeability of the skin to water was also low and although it was increased in the presence of vasotocin the magnitude of the response was much less than seen in more terrestrial anurans. The skin was permeable to urea but the movement of this solute was not remarkable when compared to that in other amphibians. These properties of the skin are discussed in relation to the animal's aquatic manner of life.",
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The permeability of the skin of the aquatic anuran Xenopus laevis (Pipidae). / Yorio, T.; Bentley, P. J.

In: Journal of Experimental Biology, Vol. 72, 01.02.1978, p. 285-289.

Research output: Contribution to journalArticleResearchpeer-review

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