[Campbell Biology P.187] What two forces combine to form an electrochemical gradient for an ... | Practice Question

What two forces combine to form an electrochemical gradient for an ion across a membrane?

  • A: Osmotic pressure and hydrostatic pressure.
  • B: The ion's concentration gradient and the membrane potential.
  • C: Active transport and facilitated diffusion.
  • D: Gravity and kinetic energy.

Explanation

The text explicitly states that an electrochemical gradient for an ion is formed by two forces: a chemical force the ion's concentration gradient and an electrical force the effect of the membrane potential on the ion's movement .