[A mechanism of passive transport of Ca2+ in muscle sarcoplasmic reticulum].

Basing on the data available in literature and authors' investigations the mechanism of local alkalization of the myoplasm by proton efflux attended by Ca2+ influx is mic reticulum and may be the main link in the process of electrochemical coupling in the skeletal and cardiac muscle cells. Experimental evidence for participation of Ca2(+)-ATPase in the passive transport of calcium through sarcoplasmic membrane is given.