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Biology 15 Online
OpenStudy (anonymous):

Which of the following accurately describes an example of how materials can move across the cell membrane through active transport? Answer A protein acts as a channel to allow large, hydrophilic molecules to diffuse across the cell membrane. A protein acts as a pump and moves calcium ions from an area of low concentration to an area of high concentration. The cell membrane folds to surround a substance and bring the substance inside the cell during exocytosis. Water moves by osmosis from higher concentration to lower concentration by passing through proteins called aquaporins. 2 point

OpenStudy (geometry_hater):

A.

OpenStudy (anonymous):

thanks i got about ten more questions if your willing to help ill post them

OpenStudy (anonymous):

a.

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