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# Cell Junctions - **Homotypic Binding:** When some receptor proteins on a cell adhere together. - **Heterotypic Binding:** When different types of proteins stick together ## Types of Junctions - **Tight Junctions:** - Plasma membrane junctions hold adjacent epithelial cells together. - H...

# Cell Junctions - **Homotypic Binding:** When some receptor proteins on a cell adhere together. - **Heterotypic Binding:** When different types of proteins stick together ## Types of Junctions - **Tight Junctions:** - Plasma membrane junctions hold adjacent epithelial cells together. - Helps restrict movement of proteins in phospholipid bilayer - Prevents substances from moving through intercellular movement. - **Desmosomes** - Spots of welding between cells. - Holds cells together - Created by dense plaques of proteins from pulling cells apart. - **Gap Junctions**