Active and Passive Transport

Front

What regulates what enters and leaves a cell?

Back

Cell Membrane

Front

What is diffusion?

Back

The movement of particles from high concentration to low concentration in a given space.

Front

What is the difference between active and passive transport?

Back

Active transport uses ATP (energy) and passive transport does not need energy.

Front

What is moving from areas of LOW concentration to areas of HIGH concentration called?

Back

Active Transport

Front

Which type of passive transport uses proteins to help molecules pass through the membrane?

Back

Facilitated diffusion.

Front

Define active transport.

Back

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

Define passive transport.

Back

The movement of molecules across a cell membrane without the use of energy.

Front

What is osmosis?

Back

The diffusion of water molecules through a selectively permeable membrane.

Front

What role do transport proteins play in facilitated diffusion?

Back

They help larger or polar molecules pass through the cell membrane.

Front

What is a concentration gradient?

Back

A difference in the concentration of a substance across a space.