Biology: Cell Transport

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What is Facilitated Diffusion?

Back

Facilitated Diffusion is the process by which molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein.

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What is Diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration without the need for energy.

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What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves from the inside of the cell to the solution, causing the cell to shrink.

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What is a Hypotonic solution?

Back

A Hypotonic solution is one that causes cells to swell and potentially burst due to the net movement of water molecules into the cell.

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What is Exocytosis?

Back

Exocytosis is the process by which large particles, cell products, or waste are released to the outside of the cell.

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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 Active Transport?

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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.

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What is a selectively permeable membrane?

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A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

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What is homeostasis?

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Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

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What is the role of carrier proteins in facilitated diffusion?

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Carrier proteins assist in the transport of specific molecules across the cell membrane without using energy.