Transport in Cells

Diffusion is...

• Particles moving from a high concentration to a low concentration

• Particles moving from a low concentration to a high concentration

• Water moving from a high concentration to a low concentration

Which of these apply to osmosis?

• Water particles

• Down a concentration gradient

• Passive (no energy)

• Against the concentration gradient

What is a factor that effects the rate of diffusion?

What is it called when the particles are spread evenly?

What is the difference between diffusion and active transport?

• Diffusion is passive, active transport requires energy

• Diffusion is any particle, active transport is just water

• There is no difference, just different names

What effect does a higher temperature have on the rate of diffusion?

• Speeds up

• Slows down

Which of these decreases the rate of diffusion?

• A high surface area

• A steep concentration gradient

• A thick membrane

What do we call a reaction that requires no energy?