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 passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, moving from an area of high concentration to an area of low concentration.

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What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, from an area of low concentration to an area of high concentration, requiring energy (ATP).

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

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What does semi-permeable mean?

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A semi-permeable membrane allows certain substances to pass through while blocking others, such as the cell membrane allowing water and small molecules to pass.

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What is endocytosis?

Back

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

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What is exocytosis?

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Exocytosis is the process by which cells expel materials to the outside environment, often involving the fusion of vesicles with the cell membrane.

Front

What is the role of ATP in active transport?

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ATP provides the energy required for active transport processes, enabling the movement of substances against their concentration gradient.

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What is diffusion?

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Diffusion is the passive movement of particles from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is a concentration gradient?

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A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of substances during diffusion and osmosis.