Cell Membrane Permeability: Water and Solute Movement Across Phospholipid Bilayer #3616147 (License: Personal Use)

This educational diagram illustrates the selective permeability of a phospholipid bilayer membrane, with hydrophilic water molecules (blue) able to pass through via aquaporins or between lipid tails, while larger solute molecules (yellow pentagons) may require facilitated transport or be blocked entirely. The arrangement highlights concentration gradients driving passive transport processes like osmosis and simple diffusion. The red-and-white bilayer structure emphasizes hydrophobic tails inward and hydrophilic heads outward.

Used in high school or college biology curricula to teach cell membrane structure and function, especially in lessons on transport mechanisms. Matches user intent for visual learners seeking clarity on osmosis, diffusion, and membrane selectivity.