... is not compromised by exposure to cold temperatures; and (2) support data from other studies, which show that, in contrast to salmonids, cod cardiac performance/myocardial contractility is not dependent upon humoral adrenergic stimulation. Fig. 3. Maximum power output ( PO max ) for Atlantic cod hearts tested...

...+ sensitivity of force generation that occurs when mammalian cardiac tissue is treated with PKA ( Fentzke et al., 1999 ; Matsuba et al., 2009 ). This change in cTn function is thought to be responsible for the increased rate of muscle relaxation that occurs following β-adrenergic stimulation in the heart...

...Todd E. Gillis; Jordan M. Klaiman SUMMARY β-Adrenergic stimulation of the mammalian heart increases heart rate, the strength of contraction as well as the kinetics of force generation and relaxation. These effects are due to the phosphorylation of select membrane and thin filament proteins by cAMP...

...-acceleration control mechanisms in place just after the heartbeat stage, while cardio-inhibitory control was not functional until after hatching. Chronic hypoxia exposure triggered bradycardia, increased the response to adrenergic stimulation in embryos and larvae, and delayed the onset of cholinergic control...

... mykiss ) before and after adrenergic stimulation. All experiments were carried out on cells kept in their native plasma. White cells were found to have an almost twenty times higher rate of oxygen consumption than red cells. Furthermore, white cells were responsible for essentially all whole-blood...

...Mikko Nikinmaa; Kirsti Tiihonen; Marita Paajaste ABSTRACT We investigated the mechanisms by which adrenergic activation of sodium/proton exchange reduces the pH gradient across the membrane of rainbow trout red cells. In untreated cells, adrenergic stimulation caused a significant increase...