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Opposite of Simple Diffussion, material moves up the concentration gradient, uses ATP and a carrier protein.
Carrier Protein [Transport Protein]
Just like an enzyme, found in facilitated diffusion, and active transport.
the movement of a substance down its concentration gradient from a more concentrated area to a less concentrated area.
the cellular uptake of materials in which the plasma membrane surrounds and engulfs extracellular materials
the spontaneous passage of molecules and ions, bound to specific carrier proteins, across a biological membrane down their concentration gradients.
lipid covalently linked to a sugar or polysaccharide, an important part of animal cell membranes
protein linked to a sugar or polysaccharide, component of receptor molecules on the outer surface of cells
Selectively Permeable Memberane
allowing some substances to cross while preventing others from crossing
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