Biological Membranes

Question 1

Diffusion

Answer 1

• Passive movement of small, non-polar lipid soluble molecules.
  -Area of HIGH TO LOW concentration.
  -The molecules move DIRECTLY through the phospholipid bilayer.

Question 2

Facilitated Diffusion

Answer 2

• Requires a CHANNEL PROTEIN in the cell membrane to transport polar molecules, charged and water soluble molecules across the membrane.