[Fluctuations in local blood flow and oxygen tension in the alveolar complexes of the mammary gland in the course of the secretory cycle].
In lactating albino mice, an interrelationship was found between rhythmic changes of the blood flow intensity and oxygen supply of secretory cells in all the alveoles during secretory cycle. The maximal value of the local blood flow (134 +/- 30 ml/100 g.min) and the minimal O2 tension level (27.5 +/- 2.8 mm Hg) were observed in the alveolar complexes at the initial stage of the secretory cycle when the oxygen consumption was the most intense in the alveolar cells. The minimal value of the local blood flow (44 +/- 2 ml/100 g.min), and the maximal O2 tension level (42.8 +/- 2.1 mm Hg) were recorded during the middle interval (30-35 min) of the secretory cycle with the lowest speed of O2 consumption in the alveolar cells. The data obtained suggest that asynchrony of function and blood supply of adjacent alveoles enables to provide secretory cells with O2 in an optimal way during different periods of their activity.
Kisliakova
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LP
D000818:Animals; D005260:Female; D007774:Lactation / Q000502:physiology*; D008321:Mammary Glands, Animal / Q000098:blood supply* / Q000378:metabolism; D051379:Mice; D008815:Mice, Inbred Strains; D010101:Oxygen Consumption; D011247:Pregnancy; D012039:Regional Blood Flow
Kolebaniia lokal'nogo krovotoka i napriazheniia kisloroda v al'veoliarnykh kompleksakh molochnoĭ zhelezy v khode sekretornogo tsikla.