Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

What is osmosis?

Back

Osmosis is the movement 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 facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special proteins called channel proteins, without the use of energy.

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What does hydrophilic mean?

Back

Hydrophilic means 'water-loving'; it describes substances that are attracted to water and can interact with it.

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What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, which requires energy (usually in the form of ATP).

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What is the difference between passive and active transport?

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Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances 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, maintaining the internal environment of the cell.

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 equilibrium is reached.

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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 across a space, which drives the movement of molecules during diffusion.

Front

What role do channel proteins play in cell transport?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane, allowing larger or polar molecules to pass through.