Afferent neural activity from pseudobranch of teleosts. Effects of Po2, pH, osmotic pressure and Na+ ions

Morphological study of the pseudobranch of teleosts has established the presence of a rich, sensory innervation composed of several types of receptors which are associated with the “true” pseudo- branchial cells and the blood vessels. Using in vitro perfused preparations of the rainbow trout (Salmo gairdnerii) pseudobranch, we have tried to establish the existence of a sensitivity to chemical factors in the plasma. Analysis of the electric …