The net direction that an ion or molecule moves is
A)dependent upon the size of the molecule.
B)unpredictable because movement is random.
C)determined by the temperature of the medium.
D)determined by the membranes in the vicinity.
E)the result of concentration differences.

Question

Quizplus · Accepted Answer

The net direction that an ion or molecule moves is determined by concentration differences through a process known as diffusion or osmosis. This movement is from high concentration to low concentration until equilibrium is reached. Size, temperature, and membranes may affect the rate of movement, but not the overall direction. Movement also follows the laws of physics and is not completely unpredictable.

The Net Direction That an Ion or Molecule Moves Is