Membrane Transport › Drawing Highlights

Electrochemical Gradient

Notes

Electrochemical Gradient

ELECTROCHEMICAL GRADIENT

  • Concentration gradient is important for movement of molecules, but voltage difference between the two sides of the membrane can also play a role

Electrochemical gradient

Combined force due to the membrane voltage and concentration gradient

Electrochemical gradient when molecules are non-charged

  • Movement based on concentration gradient ONLY, voltage difference plays no role

Electrochemical gradient when molecules are charged and voltage and concentration gradient work together

  • Larger electrochemical gradient when voltage and concentration gradient work in the same direction

Electrochemical gradient when molecules are charged and voltage and concentration gradient oppose one another

  • Smaller electrochemical gradient when voltage and concentration work in opposite directions