Functions and Clinical Significance
Start with the big picture
Albumin helps maintain colloid osmotic pressure and transports substances such as bilirubin and drugs; low levels can contribute to edema. The albumin-to-globulin ratio and protein patterns also offer diagnostic context. Among the globulins, α₁-antitrypsin inhibits neutrophil elastase, haptoglobin binds free hemoglobin, ceruloplasmin carries copper, and transferrin transports iron. Complement contributes to innate immunity, fibrinogen supports coagulation, and C-reactive protein is an acute-phase marker. Immunoglobulins mediate antibody responses. Changes in individual proteins or electrophoretic patterns—such as a monoclonal spike or a polyclonal γ-globulin increase—can point toward underlying disease, although interpretation depends on the clinical context.
What you'll learn
- Describe albumin’s roles in fluid balance and transport.
- Relate selected α₁-, α₂-, and β-globulins to their functions and clinical changes.
- Explain the diagnostic relevance of the A/G ratio and serum protein patterns.
- Summarize the roles of complement, fibrinogen, CRP, and immunoglobulins.
- Distinguish monoclonal from polyclonal γ-globulin elevation.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
