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Cell Membrane Transport Worksheet KEY Exemplar

A worksheet reviewing key concepts of cell membranes and transport, including diffusion, osmosis, active transport, and membrane structure. Covers vocabulary and processes essential for understanding how substances move in and out of cells.

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    Name Answer Key Date Per Reviewing the Concepts: The Cell M e m b r a n e and Cell Transport Part I. V o c a b u l a r y Practice: Use rhe word bank below to iW in the blanks. AU words will be used. Osmosis Diffusion Permeable Facilitated Phospholipids Hydrophobic Proteins Cholesterol Active Transport Phagocytosis Exocytosis Hydrophilic Simple 1. Th e dillusion of waie r ac toss th e cell m embran e i s callee osmosis 2. The cell membrane is described as selectively permeable a s o n |y p e r m jt s certain molecules to pass through. It is composed of a bilayer of phospholipids , with proteins embedded within. 3. D iff .is i o - s the movement of molecules from high concentration to low concentration across the cell membrane, while active transport moves molecules against their concentration gradient. 4. With simple diffusion, molecules can pass di rectly through the phospholipid bilayer, while with facilitated diffusion, molecules pass through a membrane protein. 5. hole sterol j S embedded within the cell membrane in crder to prevent the phospholipids from sticking together. 6. Each phospholipid is composed of a water-loving, or hydrophilic phosphate head and a water-fearing, or hydrophobic lipid tail. 7. Phagocytosis is a form of active transport which takes in food particles by engulfing them. The opposite of this process is called exocytosis Part I I . D i a g r a m L a b e l i n g Using the word bank, label the diagram of the cell membrane. Phosphate Head Lipid Tail Transport Protein Cholesterol Receptor Protein

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