А. Моносахариды

При гидролизе полимерных углеводов образуются олигосахариды, расщепляемые затем гликозидазами (дисахаридазами, олигосахаридазами), находящимися на внешней поверхности клеток щёточной каймы. Образующиеся моносахариды проникают в клетки эпителия кишечника с помощью различных сахарспецифичных транспортных систем. Вторичный активный транспорт обнаружен для глюкозы и галактозы. Эти сахара переносятся в клетку против градиента концентрации. При следующем переносе они поступают в кровеносную систему. Фруктоза переносится с помощью транспортной системы другого типа путём облегчённой диффузии.


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