Active and Passive Transport

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What is Active Transport?

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Active Transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.

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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 higher concentration to an area of lower concentration.

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What is the Sodium-Potassium Pump?

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The Sodium-Potassium Pump is a type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients, using ATP.

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What is Osmosis?

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Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

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What is Facilitated Diffusion?

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Facilitated Diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane without using energy.

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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 role does ATP play in Active Transport?

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ATP provides the energy required for active transport processes, allowing molecules to move against their concentration gradients.

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What is the difference between Active and Passive Transport?

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Active Transport requires energy to move substances against their concentration gradient, while Passive Transport does not require energy and moves substances along their concentration gradient.

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What is a Selectively Permeable Membrane?

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A Selectively Permeable Membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

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What is Endocytosis?

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Endocytosis is a process by which cells engulf substances from their external environment, bringing them into the cell, often using energy.