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Question


The picture shows the active transport of ions by the sodium-potassium pump.

How is diffusion different from this process?
Responses
A Diffusion takes place due to osmotic pressure.Diffusion takes place due to osmotic pressure.
B Diffusion requires cellular energy for the transfer of molecules.Diffusion requires cellular energy for the transfer of molecules.
C Diffusion requires protein channels as a passage-way for particles.Diffusion requires protein channels as a passage-way for particles.
D Diffusion transfers particles from an area of high to low concentration.

Answer 1

The correct response is:

**D** Diffusion transfers particles from an area of high to low concentration.

This is the key difference between diffusion and active transport processes like the sodium-potassium pump, which moves ions against their concentration gradient, requiring energy input. In contrast, diffusion is a passive process that occurs without the need for energy, moving substances from areas of higher concentration to areas of lower concentration.