[Functional state of the mitochondria of the small intestine mucosa during heat stress].

Rate of respiration and effectiveness of oxidative phosphorylation of intestinal mucosa mitochondria in rats revealed that adaptation to heat loads is accompanied by reversible switching over of the NAD-dependent and succinate ways of mitochondria oxygenation which maintains the normal existence of mucosal cells in conditions of heat stress. Severe heat stress disturbs the functional integrity of the oxygenation switching over and leads to disturbances of the rate of oxygenation and effectiveness of oxidative phosphorylation.