Abstract
1. Approximately twice the amount of acetic acid is needed to relax an intestinal strip when contracted by acetylcholine than when contracted by histamine.
2. The amount of acid necessary to cause relaxation is dependent within limits on the amount of histamine but independent of the amount of acetylcholine used.
3. Lactic acid has the same effect as acetic acid.
4. Increasing the calcium concentration has no effect on the acid relaxation.
Footnotes
- Received March 14, 1936.
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