Effects of environmental osmolarity on blood composition and light microscope appearance of neurosecretory neurones in the snail, Lymnaea stagnalis (L.)

Abstract

1. 1. Decreased staining intensity with the Alcian Blue-Alcian Yellow technique for neurosecretory material led to a reduction in the visible numbers of Yellow Cells and Yellow-green Cells in brains from snails exposed to deionized water for more than 2 days. compared with snails from standard tapwater. 2. 2. A significant drop in blood Na+ and Cl- concentrations preceded the histological change in Yellow Cell and Yellow-green Cell appearance. 3. 3. A significant drop in blood volume only occurred after 4 days exposure to deionized water, rather delayed with respect to the above histological and physiological changes. © 1978.