Question

which variables affect the rate of diffusion? (select all that apply.)
check all that apply
□ density of media
□ size of molecules
□ concentration gradient
□ membrane permeability
□ ph

Explanation:

• Density of media: Higher - density media can impede the movement of diffusing molecules, so it affects diffusion rate.
• Size of molecules: Larger molecules diffuse more slowly as they have more difficulty moving through spaces, so molecular size affects diffusion.
• Concentration gradient: A steeper concentration gradient (greater difference in concentration between two areas) leads to a faster diffusion rate as molecules move down the gradient more rapidly.
• Membrane permeability: If a membrane is more permeable to a molecule, the diffusion rate of that molecule across the membrane will be higher.
• pH: pH can affect the charge and structure of molecules. For example, charged molecules may interact differently with the medium or membrane at different pH levels, which can impact their diffusion rate.

Answer:

• density of media
• size of molecules
• concentration gradient
• membrane permeability
• pH