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Questions and Answers
What is the primary difference between simple diffusion and facilitated diffusion?
In which direction does osmosis occur?
What is the primary characteristic of active transport?
Which of the following types of transport does not require energy?
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What is the direction of molecule movement in simple diffusion?
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What is the primary function of transport proteins in facilitated diffusion?
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What is the result of a concentration gradient on the movement of molecules in active transport?
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What is the key difference between osmosis and facilitated diffusion?
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In which type of transport process is the movement of molecules from an area of low concentration to an area of high concentration?
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What is the role of ATP in active transport?
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Study Notes
Types of Cellular Transport
- Simple Diffusion: Movement of molecules from high concentration to low concentration areas without energy or transport proteins.
- Characteristics: No energy required, no transport proteins involved, moves from high to low concentration.
Assisted Cellular Transport
- Facilitated Diffusion: Movement of molecules across the membrane via specific transport proteins, no energy required.
- Key feature: Involves transport proteins, but no energy is needed.
Water Transport
- Osmosis: Diffusion of water through a selectively permeable membrane from low solute concentration to high solute concentration areas.
- Direction: Water moves from low solute concentration to high solute concentration areas.
Energy-Dependent Transport
- Active Transport: Movement of molecules against their concentration gradient, requiring energy in the form of ATP and transport proteins.
- Key feature: Energy from ATP is required to move molecules against their concentration gradient.
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Description
Test your understanding of cell membrane transport mechanisms, including simple diffusion, facilitated diffusion, osmosis, and active transport. Learn how molecules and water move across the cell membrane with or without energy and transport proteins.
