VOLUME AND PH REGULATION IN AGNATHAN ERYTHROCYTES - COMPARISONS BETWEEN THE HAGFISH, MYXINE GLUTINOSA, AND THE LAMPREYS, PETROMYZON-MARINUS AND LAMPETRA-FLUVIATILIS

: NIKINMAA M, TUFTS BL, BOUTILIER RG

Publisher: SPRINGER VERLAG

: 1993

: Journal of Comparative Physiology B

: JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMIC AND ENVIRONMENTAL PHYSIOLOGY

: J COMP PHYSIOL B

: 163

: 7

: 608

: 613

: 6

: 0174-1578

DOI: https://doi.org/10.1007/BF00302121

The responses of hagfish (Myxine glutinosa) and lamprey (Lampetra fluviatilis and Petromyzon marinus) erythrocytes to osmotic swelling in hypoosmotic medium and to acid-base disturbances induced by ammonium chloride prepulse were studied. The erythrocytes of hagfish regulated neither cell volume after osmotic swelling nor intracellular pH after acidification. In contrast, the erythrocytes of lamprey lost potassium and chloride after osmotic swelling, whereby their volume recovered. Furthermore, the red cell pH of lamprey recovered from experimental acidification in a nominally bicarbonate-free medium in the presence of sodium, confirming that the pathway involved is sodium/proton exchange.