...J. Anne Brown; Christopher S. Cobb; Susan C. Frankling; J. Cliff Rankin SUMMARY This study describes the first investigations of the physiological signals involved in activating the newly discovered cyclostome renin–angiotensin system (RAS) and its role in the river lamprey Lampetra fluviatilis...

... of the brain stem of the lamprey Lampetra fluviatilis. J. Comp. Neurol. 145 , 165 -177. Nieuwenhuys, R., Donkelaarten, H. and Nicholson, C. ( 1998 ). The Central Nervous System of Vertebrates . Berlin: Springer. Northcutt, R. G. ( 1979 ). Central projections of the eight cranial nerve...

... reticulospinal system lamprey Lampetra fluviatilis Ichthyomyzon unicuspis The lamprey (Cyclostome) has been extensively used as a model for studying different aspects of motor control. The lamprey swims by lateral undulations of its body that are propagated in the rostro-caudal direction...

... lamprey ( Lampetra fluviatilis ) and common carp ( Cyprinus carpio ) were held in 400l freshwater tanks at Odense University, Denmark. Yellowfin tuna ( Thunnus albacares ) were maintained in circular outdoor tanks at the Kewalo Research Facility (National Marine Fisheries Service, Honolulu Laboratory...

... Haldane effect allosteric effects agnathan hagfish Myxine glutinosa lamprey Lampetra fluviatilis Reversible binding of hydrogen ions (H + ) to haemoglobin (Hb) is of central importance for blood CO 2 transport. Carbon dioxide produced in the tissues diffuses into the red blood cells...

...J. Anne Brown; J. Clifford Rankin ABSTRACT Previous studies have suggested that in the lamprey Lampetra fluviatilis , in contrast to teleost fish, all glomeruli are actively filtering. In the present study, we have applied the ferrocyanide technique to obtain more definitive values...

...Leila V. Virkki; Annika Salama; Mikko Nikinmaa ABSTRACT We have measured the effects of oxygen tension on the transport of Na + , K + and Cl − across the erythrocyte membrane of the lamprey Lampetra fluviatilis . The transport of each ion was affected by the oxygen tension of the medium. Hypoxic...

... study was to characterize further specific Cl − transport pathways, especially those involved in Cl − efflux, in the red blood cell membrane of Lampetra fluviatilis . Cl − efflux was inhibited by 0.05 mmol l −1 dihydroindenyloxyalkanoic acid (DIOA) (81 %), 1 mmol l −1 furosemide (76 %) and 0.1 mmol l −1...

...T. G. Deliagina ABSTRACT Removal of a vestibular organ (unilateral labyrinthectomy, UL) in the lamprey ( Lampetra fluviatilis ) results in a loss of equilibrium, so that the animal rolls (rotates around its longitudinal axis) almost continuously when swimming. This paper describes (i) UL-evoked...

... lateral line extraretinal photosensitivity dermal light sense Lampetra fluviatilis Petromyzon marinus Both larval and adult lampreys possess a dermal light sense confined to the tail region ( Parker, 1905 ; Young, 1935 ). The photosensitive elements are a part of the lateral line system...

... balance membrane function Petromyzon marinus Lampetra fluviatilis Haemoglobin function in lampreys has mainly been studied using (dilute) solutions (e.g. Wald and Riggs, 1951 ; Briehl, 1963 ; Antonini et al . 1964 ; Andersen and Gibson, 1971 ; Dohi et al . 1973 ; see also reviews...

... lamprey haemoglobin Lampetra fluviatilis The current model for the behaviour of lamprey haemoglobin in solution implies that all cooperative phenomena, and the presence of Bohr and Haldane effects, are the result of association/dissociation reactions between high-affinity monomers and low...

... control Lampetra fluviatilis Petromyzon marinus The control of an animal’s orientation in space during motor activity requires integration of information from several sensory modalities. Orientation in the gravity field is stabilized by the vestibular-driven control system (see Orlovsky...

... postural control vestibular system turning movement Lampetra fluviatilis The spatial orientation of fish and lampreys can be characterized by three angles. The roll angle in the transverse plane and the pitch angle in the sagittal plane determine the animal’s orientation in the gravity field...

...Leila V. Virkki; Mikko Nikinmaa ABSTRACT The effects of intracellular acidification, osmotic shrinkage and (3 -adrenergic stimulation on sodium transport across the membrane of lamprey ( Lampetra fluviatilis ) erythrocytes were investigated. Unidirectional ouabain-insensitive sodium flux, measured...

... © 1983 by Company of Biologists 1983 Lampetra fluviatilis renal function effects of anaesthesia temperature environmental salinity Lampreys in salinities hyperosmotic to the plasma (i.e. greater than 30% sea water) replace osmotic losses by drinking large volumes of the medium...

... 18 2 1983 © 1983 by Company of Biologists 1983 Lampetra fluviatilis plasma colloid osmotic pressure Because of the comparatively low molecular weight of albumins, an albumin solution will exert a greater osmotic pressure than a globulin solution of similar concentration...