Passive Transport

Passive Transport

Diffusion

Movement of molecules from high concentration to low concentration.

Stops when equilibrium is reached

Poll

Have you smelled food cooking that was across the room? (like burnt popcorn in the microwave)

• Yes

• No

Multiple Choice

How do molecules move during diffusion?

• From high concentration to low concentration

• From low concentration to high concentration

Equilibrium

Molecules are equally spread out

Multiple Choice

What is the goal of diffusion called when molecules are equally spread out?

• Samenss

• Equilibrium

Passive Transport

• Movement of substance across plasma membrane WITHOUT any energy

Multiple Choice

Does passive transport require energy?

• Yes

• No

Simple Diffusion

Molecules move from high concentration to low concentration through a membrane

Multiple Choice

True or False: In simple diffusion, molecules move from high concentration to low concentration across a membrane.

• True

• False

Facilitated Diffusion

Molecules move from high to low concentration through a PROTEIN

Facilitated Diffusion

Does NOT require energy

Multiple Choice

Which type of diffusion uses a protein to help molecules get across?

• Simple diffusion

• Facilitated diffusion

Remember:

Diffusion is how molecules cross your cell membrane WITHOUT any energy