[Description of mitochondrial K+-transport system during intensive physical work].
The content of potassium ions in rat liver mitochondria after intensive physical work (continuous swimming) is increased approximately 2-fold, while the rate of K+ efflux from the mitochondria is significantly reduced. A considerable increase of the "calcium capacity" and a decrease of the respiration rate in state 4 were found. The experimental results indicate that during intensive physical work the mitochondrial membrane resistance to the damaging effects is enhanced. A possible mechanism of these changes is discussed.
D000818:Animals; D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism; D007700:Kinetics; D008297:Male; D008930:Mitochondria, Liver / Q000378:metabolism*; D010101:Oxygen Consumption; D005082:Physical Exertion; D011188:Potassium / Q000378:metabolism*; D051381:Rats; D013550:Swimming
D011188:Potassium; D002118:Calcium
Kharakteristika K+-transportiruiushcheĭ sistemy mitokhondriĭ pri intensivnoĭ myshechnoĭ nagruzke.