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

Statement Analysis

1. Understanding Diffusion: Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration until equilibrium is reached.

2. Membrane Permeability: Membranes can be selectively permeable, allowing certain substances to pass through while blocking others. Some small nonpolar molecules, like oxygen and carbon dioxide, can diffuse freely across membranes.

3. Cell Membrane Function: The cell membrane's structure plays a crucial role in diffusion. It consists of a lipid bilayer that allows for the passage of specific molecules through channel proteins or carrier proteins, facilitating diffusion.

Conclusion

The statement “Diffusion never occurs across a membrane” is False. Diffusion can and does occur across membranes, subject to the type of molecules and the characteristics of the membrane.