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All cells have plasma membranes. Can molecules enter and leave the cell? Yes. The plasma membrane (also called the cell membrane), is a lipid barrier where molecule organelles live. The golgi ( a cell organelle) helps move the proteins across the plasma membarane. Proteins cannot move through the plasma membrane barrier by themselves because they are not small enough like water.
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A difference in electrical charge between different parts of the same molecule is called polarity.
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it woud have tow different rezalts
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Negative Feedback Loops- <em>dampen changes</em>
Positive Feedback Loops- <em>enhance changes</em>
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