Cell Transport

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What is cell transport?

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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 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, requiring energy (ATP) to do so.

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What is passive transport?

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Passive transport is the movement of substances across a cell membrane without the need for energy, typically occurring along the concentration gradient.

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What is diffusion?

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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 osmosis?

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

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What does hydrophilic mean?

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Hydrophilic means 'water-loving'; it describes substances that can interact well with 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 facilitated diffusion?

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Facilitated diffusion is a type of passive transport that uses channel proteins to help larger or polar molecules cross the cell membrane without using energy.

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What is selective permeability?

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Selective permeability is the ability of the cell membrane to allow certain substances to pass through while blocking others.

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What happens to an animal cell in fresh water?

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An animal cell in fresh water will swell and may burst due to osmotic pressure causing water to move into the cell.