Biology Quiz: Cell Membranes

Think you know all about cell membranes? Use this self-quiz to make sure you remember active transport, plasma membranes, lipid bilayer, and more. Continue reading

My Cell Membranes

Use these flash cards to practice your grasp of endocytosis, exocytosis, turgor pressure, and dozens of other biology terms. Continue reading

Diffusion Through a Membrane

Diffusion is the net movement of particles (atoms, molecules, or ions) from a highly concentrated region to a region of low concentration. Understanding diffusion through a membrane is a key biology concept. Take this interactive tour to help you master the process and terminology. Continue reading