Passive Transport

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What is Passive Transport?

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Passive transport is the movement of molecules across a cell membrane without the use of energy, moving from an area of high concentration to an area of low concentration.

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What is Facilitated Diffusion?

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Facilitated diffusion is a type of passive transport that uses carrier proteins to help molecules move across the cell membrane from high to low concentration.

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What role does the cell membrane play in homeostasis?

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The cell membrane controls what substances can enter or leave the cell, helping to maintain homeostasis.

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What is the difference between Passive Transport and Active Transport?

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Passive transport does not require energy and moves molecules from high to low concentration, while active transport requires energy to move molecules from low to high concentration.

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What is Simple Diffusion?

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Simple diffusion is the process by which small or nonpolar molecules move directly through the cell membrane from an area of high concentration to an area of low concentration.

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What is Osmosis?

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Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

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What is a concentration gradient?

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A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion.

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What is a selectively permeable membrane?

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A selectively permeable membrane allows certain molecules to pass through while blocking others, crucial for maintaining cellular homeostasis.

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What is the function of carrier proteins in facilitated diffusion?

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Carrier proteins bind to specific molecules and change shape to transport them across the cell membrane during facilitated diffusion.

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What is the significance of energy in Active Transport?

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Active transport requires energy (usually from ATP) to move molecules against their concentration gradient, from low to high concentration.