The use of proteins in a cell membrane to move molecule from a low concentration on one side to a high concentration on the other.
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A molecule moves from a high to a low concentration across a plasma membrane. As the molecule moves across the membrane, it travels through a tube-shaped protein. This is an example of
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Proteins use the process of active transport to move substances by: a. decreasing the water content in cells to get rid of excess acid or base levels b. accumulating hydrogen ions within the cell to attract the substances c. opening passages in the membrane and escorting substances into and out of the cell d. sending antibodies to cells to carry excess proteins out to where they are needed e. attaching themselves to minerals to carry them throughout the bloodstream
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Simple diffusion goes from high concentration to low concentration water moves to higher ion concentration is facilitated by transport proteins uses energy to go from a low concentration to a high concentration
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