Simple diffusion Through Plasma membrane Cell membrane is permeable to > Non-polar molecules(02) >Lipid soluble molecules(steroids) Small polar covalent bonds( Co2) >H,O(small size, lack charge >Cell membrane impermeable to > Large polar molecules(glucose) > Charged inorganic ions(Nat)27 Simple Diffusion Through Plasma Membrane ➢Cell membrane is permeable to: ➢Non-polar molecules (02 ). ➢Lipid soluble molecules (steroids). ➢Small polar covalent bonds (C02 ). ➢H20 (small size, lack charge). ➢Cell membrane impermeable to: ➢Large polar molecules (glucose). ➢Charged inorganic ions (Na+ )