Determine whether this statement is true or false.Diffusion never occurs across a membrane.TrueFalse

Evaluation of the Statement

1. Understanding Diffusion: Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. This movement occurs spontaneously and is a fundamental concept in biology and chemistry.

2. Membrane Permeability: Biological membranes are selectively permeable, meaning that they allow certain substances to pass through while blocking others. Small, non-polar molecules (like oxygen and carbon dioxide) can diffuse freely across membranes, while larger or polar molecules often cannot.

3. Context of the Statement: The statement claims that diffusion never occurs across a membrane. This assertion is overly broad and ignores the fact that diffusion can and does occur with certain types of molecules that are able to pass through membrane structures.

4. Conclusions: Since diffusion can occur across membranes for certain substances, the statement is incorrect.

Final Answer

False. Diffusion can and does occur across membranes for various substances.