ヘンゲボヤの心臟の生理学的研究IX : Na^・, K^・, Ca^<・・>及びMg^<・・>イオンの作用

概要

論文の詳細を見る
1. A solution which contains an excess of magnesium or sodium ion hardly effects a chronotropic action on the ascidian heart. The excess of potassium ion slows down the rate of heart-beat and finally stops beating in a systolic condition. The rate of abvisceral heart-beat is increased by an excess of calcium ion in the solution. On the other hand, the advisceral heart-beat is decrased by this ion. Both hearts stop in diastole in a solution containing a great excess of calcium ion. 2. Effect of the excess of an ion in the solution on the number of beats in one direction varies according to the sort and amount of the ion. 3. Effect of the deficiency of an ion in the solution is generally the reverse of that of the excess. 4. Na^・, K^・, Ca^<・・> and Mg^<・・> ions have an antagonistic action each other on the heart. 5. These ions are considered to be indispensable for the heart-beat in Polycisor.
社団法人日本動物学会の論文
1955-01-15