Which of the following is NOT listed as a factor that affects diffusion?

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Multiple Choice

Which of the following is NOT listed as a factor that affects diffusion?

Diffusion rate is governed by how freely particles move and the forces acting on them. Smaller molecules or ions diffuse more quickly than larger ones, because they encounter less resistance as they travel. Higher temperature increases kinetic energy, making molecules move faster and diffusion happen more rapidly. Electrical charge matters too; charged particles interact with other ions and with any electric potential across a medium, which can speed up or slow down their spread. The presence of a membrane isn’t a property that changes diffusion in a simple, uniform medium—it’s a barrier that can restrict diffusion or require specific transport mechanisms to cross. Therefore, the factor that isn’t listed as affecting diffusion in the same way is the presence of a membrane.

Diffusion rate is governed by how freely particles move and the forces acting on them. Smaller molecules or ions diffuse more quickly than larger ones, because they encounter less resistance as they travel. Higher temperature increases kinetic energy, making molecules move faster and diffusion happen more rapidly. Electrical charge matters too; charged particles interact with other ions and with any electric potential across a medium, which can speed up or slow down their spread. The presence of a membrane isn’t a property that changes diffusion in a simple, uniform medium—it’s a barrier that can restrict diffusion or require specific transport mechanisms to cross. Therefore, the factor that isn’t listed as affecting diffusion in the same way is the presence of a membrane.

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