What are the key differences between integrin and cadherin in terms of their functions and mechanisms of action?

Integrins are cell surface receptors that mediate cell adhesion to the extracellular matrix, while cadherins are cell adhesion molecules that facilitate cell-cell adhesion. Integrins bind to extracellular matrix proteins, while cadherins bind to other cadherins on adjacent cells. Integrins are involved in signaling pathways that regulate cell migration and proliferation, while cadherins are important for maintaining tissue structure and organization.