What is the driving force for Passive Diffusion?(a) Concentration gradient only(b) Electrochemical gradient only(c) Charge equilibration and concentration gradient(d) Concentration and Electrochemical gradient bothThe question was posed to me by my school principal while I was bunking the class.The question is from Mechanisms of Drug Absorption in portion Absorption of Drugs of Drug Biotechnology

What is the driving force for Passive Diffusion?(a) Concentration grad

1.	What is the driving force for Passive Diffusion?(a) Concentration gradient only(b) Electrochemical gradient only(c) Charge equilibration and concentration gradient(d) Concentration and Electrochemical gradient bothThe question was posed to me by my school principal while I was bunking the class.The question is from Mechanisms of Drug Absorption in portion Absorption of Drugs of Drug Biotechnology
Answer» Correct answer is (d) Concentration and ELECTROCHEMICAL gradient both Explanation: PASSIVE diffusion, the driving FORCES are both concentration gradient and electrochemical gradient. According to Fick’s first law of diffusion, drug MOLECULES always diffuse from the site of higher concentration to the site of lower concentration until equilibrium is attained.

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