- 期刊
Effect of Tension and Hydrostatic Pressure on Electrical Properties of Frog Skin
張力與壓力改變蛙皮膚電位差短路電流及電阻之影響
摘要
在夏季用離體虎皮蛙部皮膚，測量皮膚電位差，短路電流及電阻，並觀察其於皮膚張力或皮膚兩邊壓力改變時之變化，結果發現蛙皮兩邊電位差平均爲59.1mV，電阻平均爲2083ohms/cm^2，在蛙皮任何一邊改變其張力均可使短路電流降低，電阻增高，電位差之心迹不一致。增加蛙皮內側之壓力可使電位差增大，增加蛙皮外側之壓力可使電位差降低。增加任何一側之壓力均可使短路電流降低。腎上腺素濃度高至10^(-5)(W/V)對上述反應無顯著影響。
關鍵字
無資料並列摘要
Hsieh, C. C., H. K. Hsu, and H. H. Lu. Effect of tension and hydrostatic pressure on electrical properties of frog skin. Chinese J. Physiol., 21(2): 131-136, 1972-Effects of tension and hydrostatic pressure on the potential gradient, short-circuit current and resistance across the isolated Rana trigrina frog skin were determined. It was found that mechanical stretch of the skin from either side caused a decrease of short-circuit current and an increase of skin resistance. Raising the hydrostatic pressure on the outer side of the skin led to a drop of the potential gradient. Increase of hydrostatic pressure on the inner side of the skin had the opposite effect. Application of pressure on either side of the skin caused a decrease of the short-circuit current. Epinephrine in concentration up to 10^(-5)(w/v) did not alter the responses of the skin to either stretch or hydrostatic pressure changes. It is concluded that both tension and hydrostatic pressure changes are capable of altering the electrical properties of the frog skin. Involvements of active processes in the skin responses to these mechanical forces are unlikely.