Plasma Membrane – Plant Cells

The plasma membrane is a selectively permeable membrane made up of a lipid bilayer and proteins surrounding the cell but inside the cell wall. Explore the process, structure, and function of a plant cell’s plasma membrane with this interactive tutorial. Continue reading

Plasma Membrane – Animal Cell

The plasma membrane is a selectively permeable membrane made up of a lipid bilayer and proteins surrounding the cell. Explore the process, structure, and function of an animal cell’s plasma membrane with this interactive tutorial. Continue reading

Lipid Bilayer

The lipid bilayer is an organic compound that is insoluble in water but soluble in nonpolar solvents, providing the basic impermeable structure of the membrane. Explore the process, structure, and function of an plasma membrane’s lipid bilayer with this interactive tutorial. Continue reading

Endocytosis

Endocytosis is a cellular process where cells absorb molecules or substances from outside the cell by engulfing it with the cell membrane. This tutorial explains the cellular processes involved in endocytosis, including phagocytosis, pinocytosis, and receptor-mediated endocytosis. 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