Cholinergic and adrenergic influences on the heart of the African lungfish (Protopterus annectens)

Sandblom, Erik,1978Gothenburg University,Göteborgs universitet,Zoologiska institutionen,Department of Zoology (författare)

Cardiac cholinergic and adrenergic tones were determined in minimally instrumented African lungfish Protopterus annectens. Mean +/- S.E. routine heart rate (f(H)) was 31.6 +/- 1.4 beats min(-1), cholinergic tone was 34.6 +/- 5.2% and adrenergic tone was 9.4 +/- 2.3%, while the intrinsic f(H) after blockade of both adrenergic and cholinergic control systems was 39.1 +/- 1.3 beats min(-1). It is demonstrated that routine cholinergic tone has probably been underestimated in previous studies on lungfishes, suggesting that withdrawal of vagal tone may provide an important mechanism to increase f(H) in this group of fishes during, for example, air breathing.

Gräns, Albin,1979Gothenburg University,Göteborgs universitet,Zoologiska institutionen,Department of Zoology(Swepub:gu)xgraal (författare)
Seth, Henrik,1979Gothenburg University,Göteborgs universitet,Zoologiska institutionen,Department of Zoology(Swepub:gu)xsethe (författare)
Axelsson, Michael,1958Gothenburg University,Göteborgs universitet,Zoologiska institutionen,Department of Zoology(Swepub:gu)xaxemi (författare)
Göteborgs universitetZoologiska institutionen (creator_code:org_t)

Av författaren/redakt...: Sandblom, Erik, ...; Gräns, Albin, 19 ...; Seth, Henrik, 19 ...; Axelsson, Michae ...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.