Abstract
The rates of hemolysis of several spp. of mammalian erythrocytes (man, dog, guinea pig and rat) in isotonic solutions of acetyl choline, acetyl-[beta]-methyl choline, benzoyl choline and choline were studied. The 2 most important factors affecting these rates are the pH of the medium and erythrocyte cholinesterase activity. The acetyl choline-cholinesterase system, in addition to playing a vital role in the selective permeability of the cell membrane, may control the membrane pH.