Active Transport

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What is Active Transport?

Back

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

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What is Passive Transport?

Back

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

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Define Endocytosis.

Back

Endocytosis is the process by which a cell engulfs material from its environment, bringing it into the cell by forming a vesicle.

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What is Exocytosis?

Back

Exocytosis is the process by which a cell expels materials to the outside environment by vesicles fusing with the cell membrane.

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What is the Na/K pump?

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The Na/K 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 the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during transport.

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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 to move substances against their concentration gradients.

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What is the difference between facilitated diffusion and active transport?

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Facilitated diffusion is a type of passive transport that uses transport proteins to move molecules across the membrane without energy, while active transport requires energy to move molecules against their gradient.

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What is a Carrier Protein?

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A carrier protein is a type of membrane protein that transports specific substances across a cell membrane by changing shape.

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What is Osmosis?

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Osmosis is the passive transport of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.