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 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 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 active transport?

Back

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

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What does hydrophilic mean?

Back

Hydrophilic means 'water-loving'; it describes substances that can interact with or dissolve in water.

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What does hydrophobic mean?

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Hydrophobic means 'water-fearing'; it describes substances that do not interact well with water and tend to repel it.

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What is a semi-permeable membrane?

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A semi-permeable membrane is a barrier that allows certain substances to pass through while blocking others, often used to regulate the movement of materials in and out of cells.

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What is facilitated diffusion?

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Facilitated diffusion is the process by which molecules pass through a cell membrane via special proteins, without the use of energy, moving from high to low concentration.

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What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion and osmosis.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.