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What is facilitated diffusion?

Back

Facilitated diffusion is a passive transport process that allows molecules to cross the cell membrane with the assistance of special proteins, moving from an area of high concentration to an area of low concentration without the use of energy.

Front

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, which requires energy, usually in the form of ATP.

Front

What role do protein pumps play in cell transport?

Back

Protein pumps are integral membrane proteins that use energy to transport ions and molecules against their concentration gradient, from low to high concentration.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

Front

How does the cell membrane maintain homeostasis?

Back

The cell membrane maintains homeostasis by controlling the movement of substances in and out of the cell, ensuring that essential nutrients enter and waste products exit.

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What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

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What is a selectively permeable membrane?

Back

A selectively permeable membrane is a type of biological membrane that allows certain molecules or ions to pass through it by means of active or passive transport.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until they are evenly distributed.

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What is the significance of concentration gradients in cell transport?

Back

Concentration gradients are crucial in cell transport as they drive the movement of substances; molecules move from areas of high concentration to low concentration in passive transport.

Front

What is the function of channel proteins?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane by providing a passageway for molecules to move through.