Cellular junctions connect neighboring cells and allow for cellular adhesion and communication. There are four main types of cellular junctions: tight junctions, gap junctions, focal junctions, and adherence junctions. Each type serves a different function in cellular adhesion and communication.

1. Cellular level of Organization
Dr Sarita Sharma
Associate Professor
Department of Pharmacology
MMCP, MMDU

2. Cell Junctions:
• Definition: It connects neighboring cells or cells to extracellular matrix.
• Function : cellular adhesion and cellular communication.
• Types:
1. Tight junction/ Occluding junction
2. Gap junction/ Communicating junction
3. Focal junction/ Hemidesmosomes
4. Adherence Junction/ Desmosome

11. CELL SURFACE RECEPTORS INTRACELLULAR/ NUCLEAR RECEPTORS