CP

Question 1

What is the plasma membrane permeable to?

Answer 1

• non polar, uncharged molecules (O2, N2, benzene)
• lipid soluble molecules (steroids, fatty acid, some vitamins)
• small, uncharged polar molecules (water, urea, glycerol, CO2)

Question 2

What is the plasma membrane impermeable to?

Answer 2

• large uncharged polar molecules (glucose, amino acids)

- ions (Na+, K+, Cl-, Ca2+, H+)