Tissue buffering in the snail, Helix aspersa

Comparative biochemistry and physiology Pub Date : 1970-11-15 DOI:10.1016/0010-406X(70)90544-X

R.F. Burton

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引用次数: 29

Abstract

1.
1. Changes in the concentrations of calcium and bicarbonate in the blood of hydrated Helix aspera, exposed to raised tensions of carbon dioxide or injected with HCl, NaHCO₃ or CaCl₂, were qualitatively those to be expected if the blood were in equilibrium with solid calcium carbonate.
2.
2. However, the blood was found to be greatly supersaturated with respect to calcite and aragonite, even allowing for the presence of unionized calcium.
3.
3. Concentrations of calcium in the blood of control snails showed a marked correlation with total concentrations of blood solutes.
4.
4. Potassium levels were unchanged by hypercapnia and by the injection of CaCl₂ or NaHCO₃, but rose following the injection of HCl. Raising the concentration of potassium in the blood brought about an increase in the concentration of calcium without significant change in bicarbonate.

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蜗牛的组织缓冲，螺旋

1.1. 如果血液与固体碳酸钙平衡，则暴露于二氧化碳张力升高或注射HCl, NaHCO3或CaCl2的水合螺旋aspera血液中钙和碳酸氢盐浓度的变化在定性上是可以预期的。然而，即使考虑到工会化钙的存在，血液中方解石和文石的含量也明显过饱和。对照螺血钙浓度与血溶质总浓度呈显著相关。高碳酸血症和注射CaCl2或NaHCO3后，钾水平不变，但注射HCl后，钾水平升高。血液中钾的浓度升高导致钙的浓度升高，而碳酸氢盐的浓度没有显著变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Comparative biochemistry and physiology

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