Cell Membrane, Passive Transport, and Active Transport notes

Front

What is the definition of Osmosis?

Back

Movement of water across a membrane from high to low concentration.

Front

Does Osmosis require energy?

Back

False

Front

What is Facilitated Diffusion?

Back

Passive transport of molecules down a concentration gradient with the help of proteins.

Front

Does Facilitated Diffusion require energy?

Back

False

Front

What is Active Transport?

Back

The movement of molecules against a concentration gradient, requiring energy.

Front

What is a concentration gradient?

Back

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

Front

What role do proteins play in Facilitated Diffusion?

Back

They help certain molecules that cannot pass through the cell membrane to enter or exit the cell.

Front

What is the main difference between Passive Transport and Active Transport?

Back

Passive transport does not require energy, while active transport does.

Front

What is an example of Passive Transport?

Back

Diffusion and Osmosis.

Front

What is an example of Active Transport?

Back

Sodium-potassium pump.