Passive and Active Transport Review

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, moving from areas of higher concentration to areas of lower concentration.

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What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, moving from areas of lower concentration to areas of higher concentration.

Front

What is osmosis?

Back

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

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell will lose water and shrink due to the higher concentration of solutes outside the cell.

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What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, a cell will gain water and may swell or burst due to the lower concentration of solutes outside the cell.

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What is a semi-permeable membrane?

Back

A semi-permeable membrane is a barrier that allows certain substances to pass through while blocking others, such as a cell membrane.

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What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move molecules across the cell membrane.

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What is endocytosis?

Back

Endocytosis is an active transport process where cells engulf substances from the outside environment, bringing them into the cell.

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What is exocytosis?

Back

Exocytosis is an active transport process where cells expel materials to the outside environment by vesicles fusing with the cell membrane.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of any molecules from high to low concentration, while osmosis specifically refers to the movement of water.