Active and Passive Transport

Front

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, using energy (ATP).

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What is Passive Transport?

Back

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

Front

Define Osmosis.

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

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What is Diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.

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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 a Hypotonic Solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell.

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What is a Hypertonic Solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell.

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What is an Isotonic Solution?

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An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

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What is Endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a vesicle.

Front

What is Exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.