Final answer:
Pulmonary fibrosis is a lung disease characterized by scar tissue build-up. One factor that is upregulated in this condition is fibronectin, an important glycoprotein involved in cell adhesion and migration.
Step-by-step explanation:
Pulmonary fibrosis is a lung disease characterized by the build-up of scar tissue in the lungs, which results in decreased lung function. One factor that is upregulated in pulmonary fibrosis is fibronectin. Fibronectin is an important glycoprotein involved in cell adhesion and cell migration. In this condition, increased expression of fibronectin contributes to the formation of scar tissue and the progression of the disease.