...Sandra Imbrogno; Maria Carmela Cerra; Bruno Tota SUMMARY Using an isolated working heart preparation we show that angiotensin II(ANG II), at concentrations of 10 -10 –10 -7 mol l -1 , elicits negative chronotropism and inotropism in the freshwater eel Anguilla anguilla . The negative inotropism...

... and dietary salt may help maintain electrolyte homeostasis. Unlike most other aquatic mammals, sea otters commonly drink sea water and manatees frequently drink fresh water. Among the various taxonomic groups of marine mammals, the sensitivity of the renin–angiotensin–aldosterone system appears...

... integument, none of them mimicked the effect of an experimental rise in intracellular cyclic AMP level. The invertebrate peptides conopressin and angiotensin II amide inhibited short-circuit-current-( I sc ) and amiloride-sensitive Na + transport ( I amil ), although to slightly different degrees...

...Alejandro Delorenzi; Beatriz Dimant; Lia Frenkel; Victor E. Nahmod; Dick R. Nässel; Héctor Maldonado ABSTRACT Previous work on the brackish-water crab Chasmagnathus granulatus demonstrated that an endogenous peptide similar to angiotensin II plays a significant role in enhancing long-term memory...

...N. H. West; P. Kimmel; Z. L. Topor; M. D. Evered ABSTRACT Little is known about the role of the renin–angiotensin system in anuran amphibians, although they appear to possess the functional components of such a system. We investigated the role of angiotensin (ANG) in arterial blood pressure...

... (ACTH; 7.5 i.u. kg −1 ), serotonin (250 nmol kg −1 ), carbachol (100 μmol kg −1 ), [Asn 1 -Val 5 ]angiotensin II (Ang II; 100 nmol kg −1 ), histamine (0.3–300 μmol l −1 ) and a high-[K + ] saline (60 mmol l −1 ), (2) whether serotonin is co-released with the catecholamines of the chromaffin tissues...

... by direct adrenergic stimulation of the heart. Angiotensin II (Ang II) produced consistent hypertension by systemic vasoconstriction. In contrast to the effects of adrenaline injection, the hypertension caused by Ang II was accompanied by a marked bradycardia. This could be abolished by atropine, suggesting...

...Björn Platzack; Michael Axelsson; Stefan Nilsson ABSTRACT The effects of angiotensin I, angiotensin II and exercise on ventral and dorsal aortic blood pressure and heart rate were investigated in the Atlantic cod, Gadus morhua . Both angiotensins produced a marked increase in blood pressure. After...