Cell Transport

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

Define passive transport.

Back

The movement of molecules across a cell membrane without the use of energy, typically from an area of high concentration to an area of low concentration.

Front

What is active transport?

Back

The movement of molecules across a cell membrane using energy, typically against their concentration gradient.

Front

What role do phospholipids play in the cell membrane?

Back

They form the basic structure of the cell membrane, creating a bilayer that is semi-permeable.

Front

Explain facilitated diffusion.

Back

A type of passive transport that uses protein channels to help move molecules across the cell membrane.

Front

What is the difference between facilitated diffusion and active transport?

Back

Facilitated diffusion does not require energy, while active transport does.

Front

What are protein pumps?

Back

Proteins that actively transport molecules across the cell membrane using energy.

Front

How do large molecules typically cross the cell membrane?

Back

Through the assistance of proteins that facilitate their transport.

Front

What is concentration gradient?

Back

The difference in concentration of a substance across a space.

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.