Diffusion & Facilitated Diffusion

Front

What is Passive Transport?

Back

The movement of particles across the membrane from an area of high concentration to an area of low concentration without the use of energy.

Front

What is the direction of movement in Passive Transport?

Back

From high concentration to low concentration.

Front

What is net movement?

Back

The number of molecules moving in one direction minus the number of molecules moving in the opposite direction.

Front

What is required for Facilitated Diffusion?

Back

A membrane-spanning protein to help transport particles across the membrane.

Front

Does Passive Transport require energy?

Back

No, it does not require energy.

Front

Give an example of diffusion.

Back

CO2 and O2 exchange in the lungs.

Front

What is the role of membrane-spanning proteins in Facilitated Diffusion?

Back

They assist in transporting specific molecules across the cell membrane.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion occurs directly through the membrane, while facilitated diffusion requires proteins to help transport molecules.

Front

What happens to molecules during diffusion?

Back

They move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is dynamic equilibrium?

Back

A state where the number of molecules moving in one direction is equal to the number moving in the opposite direction.