Passive and Active Transport

Front

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 high concentration to an area of low concentration.

Front

What is Active Transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, typically moving from an area of low concentration to an area of high concentration.

Front

Define 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 Osmosis?

Back

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.

Front

What is Facilitated Diffusion?

Back

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

Front

What happens to a cell in a Hypotonic solution?

Back

In a hypotonic solution, water enters the cell, causing it to swell and potentially burst (lyse).

Front

What happens to a cell in a Hypertonic solution?

Back

In a hypertonic solution, water leaves the cell, causing it to shrink and become dehydrated.

Front

What is Endocytosis?

Back

Endocytosis is the process by which a cell engulfs material from its environment, bringing it into the cell.

Front

What is Exocytosis?

Back

Exocytosis is the process by which a cell expels materials to the outside environment, often using vesicles.

Front

What is the Sodium-Potassium Pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, using energy.