Cell Membrane Functions Flashcard

Front

What is Active Transport?

Back

Active Transport is the process of moving molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

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What is Osmosis?

Back

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

Front

What is Diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration without the use of energy.

Front

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.

Front

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.

Front

What is the Concentration Gradient?

Back

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

Front

What is Facilitated Diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What is a Selectively Permeable Membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is the role of Channel Proteins?

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Channel proteins facilitate the transport of specific substances across a cell membrane by providing a passageway.

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What is the difference between Active Transport and Passive Transport?

Back

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.