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 in the form of ATP.

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 higher concentration to an area of lower concentration.

Front

Define Diffusion.

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until they are evenly distributed.

Front

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 Endocytosis?

Back

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

Front

What is Exocytosis?

Back

Exocytosis is the process by which a cell expels materials by vesicles fusing with the cell membrane.

Front

What is a Hypertonic solution?

Back

A hypertonic solution has a higher concentration of solute particles compared to another solution.

Front

What is a Hypotonic solution?

Back

A hypotonic solution has a lower concentration of solute particles compared to another solution.

Front

What is an Isotonic solution?

Back

An isotonic solution has the same concentration of solute particles as another solution.

Front

What is the Sodium-Potassium Pump?

Back

The sodium-potassium pump is a type of active transport that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.