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.

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What is Selective Permeability?

Back

The ability of the cell membrane to allow some substances to pass through while preventing others.

Front

What is a Concentration Gradient?

Back

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?

Back

The process of molecules diffusing through a protein channel in the cell membrane, moving from an area of high concentration to low concentration without energy.

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What is Endocytosis?

Back

The process by which cells engulf substances from the outside environment, bringing them into the cell.

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What is Osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

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What is Active Transport?

Back

The movement of substances across the cell membrane against their concentration gradient, requiring energy.

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What is Simple Diffusion?

Back

The movement of small or nonpolar molecules directly through the lipid bilayer of the cell membrane from high to low concentration.

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What role do protein channels play in cell transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, especially those that cannot pass through the lipid bilayer.

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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 gradient.