BIO 12 UNIT 2: Study Notes

TRANSPORT ACROSS CELL MEMBRANE

FACTORS AFFECTING THE RATE OF DIFFUSION ACROSS CELL MEMBRANE:

• Size: Smaller Molecule (size and mass)= diffuse faster  
• Temperature: Higher temperature= higher rate of diffusion
• Concentration Gradient: Greater difference in concentration gradient= faster diffusion
• Number of protein pores or carriers in cell membrane: More Pores= faster diffusion