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9 Cards in this Set
- Front
- Back
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Because cells have a watery environment both inside and outside, the polar ends of the phospholipids in the plasma membrane form _____ layers
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Double
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Because the phospholipid molecules and some proteins are free to move, the plasma membrane is said to be a
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Fluid mosaic
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A plasma membrane is made up of a
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Lipid bilayer
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Which of the following structures serves as the cell's boundary from its environment?
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cell membrane
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Which of the following is a function of the cell membrane?
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regulates which materials enter and leave the cell.
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The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?
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proteins
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What would happen if the cell membrane became impermeable?
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Cells would die. Needed nutrients such as food and water can not get inside the cell for its use and waste would accumulate
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What is the function of membrane proteins?
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Some function as enzymes and others sersve as markers that enable the immune system to distinguish an organisms own cells from foreign cells.
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