English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Perivascular stimulation of the hepatic nerves in the in situ perfused rat liver with a constant frequency of 20 Hz over a constant period of 5 min had previously been shown to cause an increase of glucose output, a shift from lactate uptake to release, a reduction in perfusion flow (Hartmann et al. (1982) Eur. J. Biochem. 123, 521-526) and an overflow of noradrenaline into the hepatic vein (Beckh et al. (1982) FEBS Lett. 149, 261-265). In the present study the dependence of the metabolic and hemodynamic effects on the frequency between 1 and 30 Hz and duration of stimulation between 0.5 and 5 min was investigated. Over a constant stimulation period of 5 min the alteration in glucose exchange was maximal with a frequency of 10 Hz and half-maximal with 4 Hz. The corresponding values for the exchange of lactate were 5 Hz and 2 Hz, respectively, and for the perfusion flow 2.5 Hz and 1.5 Hz, respectively. An increase of noradrenaline overflow was not observed with the lower frequencies of 1 and 2.5 Hz; it was maximal at 10 Hz and half-maximal at 6.5 Hz. At a constant frequency of 20 Hz the increase in glucose release was maximal with a total stimulation period of 1 min and half-maximal with a period of 0.4 min. An essentially maximal alteration of lactate exchange and perfusion flow as well as of noradrenaline overflow was also effected by a stimulation period of 1 min.(ABSTRACT TRUNCATED AT 250 WORDS)

Control of Glycogenolysis and Hemodynamics in Perfused Rat Liver by the Sympathetic Innervation. Dependence on Stimulation Frequency and Duration