Physical and adrenergic factors affecting systemic vascular resistance in the rainbow trout: a comparison with branchial vascular resistance.

C. M. Wood, G. Shelton

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The passive distensibility and adrenergic reactivity of the systemic vascular resistance (Rs) in Salmogairdneri have been studied using perfused trunk preparations, and the data compared with previous results on the branchial resistance (Rg). At normal levels of efferent blood pressure, Rs is relatively more distensible than Rg in response to afferent pressure increases, but this difference may not be important in vivo. alpha-adrenegic constrictory receptors predominate in Rs, in contrast to beta-adrenergic dilatory receptors in Rg; a significant alpha-adrenergic tone in Rs is lost during perfusion. Rs is far less sensitive than Rg to circulatory catecholamine levels. It is suggested that the sympathetic nervous system, rather than plasma catecholamines, provides the effective adrenergic control of Rs in vivo.

Original languageEnglish
Pages (from-to)505-523
Number of pages19
JournalJournal of Experimental Biology
Volume63
Issue number2
StatePublished - Oct 1 1975

Fingerprint

Oncorhynchus mykiss
catecholamines
blood vessels
Vascular Resistance
Adrenergic Agents
rainbow
sympathetic nervous system
Catecholamines
nervous system
blood pressure
blood
Receptors, Adrenergic, beta
Sympathetic Nervous System
plasma
receptors
Perfusion
Blood Pressure
Pressure
comparison
beta adrenergic receptors

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Agricultural and Biological Sciences (miscellaneous)

Cite this

Physical and adrenergic factors affecting systemic vascular resistance in the rainbow trout : a comparison with branchial vascular resistance. / Wood, C. M.; Shelton, G.

In: Journal of Experimental Biology, Vol. 63, No. 2, 01.10.1975, p. 505-523.

Research output: Contribution to journalArticle

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