2.13 & 2.14 Active and Passive Transport Flashcard BWHS

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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, moving from an area of higher concentration to an area of lower concentration.

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What is Osmosis?

Back

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 Exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

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What is Endocytosis?

Back

Endocytosis is the process by which a cell takes in materials by engulfing them in a vesicle formed from the cell membrane.

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What does 'high concentration area' mean?

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A high concentration area refers to a region where molecules are tightly packed together.

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What is the concentration gradient?

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

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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.

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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 to move molecules against 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.