2. Passive transport and active transport A. Comparison of two classes of transport. Table 8-2 Properties of Passive and Active Transport Diffusion (Passive Transport Properties Simple Diffusion Facilitated Diffusion Active Transport Solutes transported Examples Small nonpolar Oxygen Large nonpolar Fatty acids No Small polar Water No Large polar Glucose N Yes lons N+K+ cac- No Yes Thermodynamic properties Direction relative to electrochemical gradient Down D Effect on entropy Increased Increased Decreased Metabolic energy required No No Intrinsic directionality No Kinetic properties Carrier-mediated Yes Yes(pump) Michaelis-Menten kinetics No Yes Competitive inhibition N Yes Yes2. Passive transport and active transport A. Comparison of two classes of transport