Rapuzzi G, Gilberti Vitali G, Villa Balduini A, Violante A
Boll Soc Ital Biol Sper. 1983 Dec 30;59(12):1903-9.
In the research it has been tested the ability of convoluted capillary network of the fungiform papillae to act as countercurrent ionic exchanger and therefore to give rise a water uptake from the external environment. Manometric determinations of the water inflow during immersion of the tongue in solutions of different osmolality have shown a conspicuous water uptake, osmotic in nature and largely supported by the Na+ absorbed from the external solutions. The Na+ inhibits also the receptor electrical response to the stimulating Ca++ solutions. These observations show that the papillae can be considered as osmotic devices and emphasise also that the Na+ is directly involved in the papillary functional activity.
在这项研究中，已经测试了菌状乳头的盘绕毛细血管网络作为逆流离子交换器的能力，从而从外部环境中吸收水分。在将舌头浸入不同渗透压的溶液中时，对水流入量进行的压力测定显示出明显的水分吸收，这种吸收本质上是渗透性的，并且在很大程度上由从外部溶液中吸收的Na⁺所支持。Na⁺还抑制受体对刺激性Ca²⁺溶液的电反应。这些观察结果表明，乳头可被视为渗透装置，同时也强调Na⁺直接参与乳头的功能活动。
