Bio 7-3

Question 1

Osmosis

Answer 1

The diffusion of water
When water can easily pass through membranes
Salts and sugars cannot pass through

Question 2

Facilitated Diffusion

Answer 2

Occurs when molecules move across the membrane through proteins

• Move from high concentration to low concentration
• No energy is needed

Question 3

Cell membrane

Answer 3

Role- regulates what enters and leaves the cell
Made of a double layer of lipids called lipid bilayer
Protects inside of the cell