Active Transport

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What is active transport?

Back

Active transport is the process by which cells use energy (usually from ATP) to move substances against their concentration gradient, from an area of lower concentration to an area of higher concentration.

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What is passive transport?

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Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

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What is the role of ATP in active transport?

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

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What is a pump transport protein?

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A pump transport protein is a type of membrane protein that actively transports ions or molecules across the cell membrane, often moving one substance in one direction while transporting another in the opposite direction.

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What is pinocytosis?

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Pinocytosis is a form of endocytosis where the cell engulfs liquid and small solutes, allowing them to enter the cell.

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What is phagocytosis?

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Phagocytosis is a type of endocytosis in which a cell engulfs large particles or other cells, often used by immune cells to eliminate pathogens.

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What is facilitated diffusion?

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Facilitated diffusion is a passive transport process that uses specific transport proteins to help move substances across the cell membrane without energy.

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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 lower solute concentration to an area of higher solute concentration.

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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 the sodium-potassium pump?

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The sodium-potassium pump is a specific type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, crucial for maintaining cellular function.