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 diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration until equilibrium is reached.

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What is osmosis?

Back

Osmosis is 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 facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules move across the cell membrane through a carrier protein from an area of high concentration to an area of low concentration without using energy.

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What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from an area of low concentration to an area of high concentration, requiring energy (ATP) to do so.

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What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

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What is endocytosis?

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Endocytosis is the process by which a cell takes in materials by engulfing them in a vesicle formed from the cell membrane.

Front

What is the role of carrier proteins in facilitated diffusion?

Back

Carrier proteins assist in the transport of specific molecules across the cell membrane by changing shape to allow the molecule to pass through.

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What happens to carbon dioxide when a cell with 3% carbon dioxide is placed in a 2% carbon dioxide solution?

Back

Carbon dioxide will move out of the cell due to the concentration gradient.

Front

What is the difference between pinocytosis and phagocytosis?

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Pinocytosis is the process of taking in liquid and small particles, while phagocytosis is the process of engulfing large particles or cells.