active transport


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active transport

[′ak·tiv ′tranz‚pȯrt]
(physiology)
The pumping of ions or other substances across a cell membrane against an osmotic gradient, that is, from a lower to a higher concentration.
References in periodicals archive ?
2012), and a longitudinal study showed significant contributions of PA from active transport to overall PA as participants who increased their active transport levels had an additional 135 min of total PA per week (Sahlqvist et al.
magna suggests that this structure is engaged in the active transport of ions from the medium into the hemolymph to maintain osmotic constancy of the body fluids, as well as trans-epithelial transport of hemolymph macromolecules for synthesis of protein and lipid components of the cuticle covering these organs.
Magnesium is absorbed from the diet via passive and active processes: passive intercellular movement of magnesium through enterocyte junctions of the intestinal epithelium, and receptor-mediated active transport of magnesium into enterocytes via the transient receptor potential melastatin (TRPM)-6 and TRPM-7 transporters (3).
The vast majority of catalyzing biological processes is performed by enzymes which provide a wide variety of functions inside organisms, they are indispensable for metabolic processes, cellular signaling and regulation and can generate movement and active transport of molecules.
Based on the aforesaid, the Turkmen side notes that Turkmenistan will continue to pursue active transport policies aimed at addressing the global challenges facing the international community in the context of sustainable development," the envoy concluded.
Turkmenistan will continue to pursue active transport policy aimed at solving the global challenges in the context of sustainable development," Ishankuli Amanlyev concluded.
Our preferred option is to invest in sustainable transport, including public and active transport.
We need to do more active transport, reduce sitting and television time and incorporate active play into everyday life.
Thus, plasma membrane regulates the transport of molecules into and out of the cell by simple diffusion and active transport (Figure 4).
We've also entered into some exciting technology partnerships that enable us to integrate mobile computing, electronic proof of delivery and in-vehicle camera technology with our Active Transport Management System (ATMS)," says Megan Turner.
These results suggest that the absorption of FeSO4 and Fe-Gly in Caco-2 cells is mainly through active transport.