What term describes the study of how disease processes affect the functions of the body?

• A. Pathophysiology
• B. Physiology
• C. Anatomy
• D. Pathology

Answer: (A)

Pathophysiology explains how disease processes disrupt normal body function. It connects the underlying mechanisms at the cellular and organ levels to the signs and symptoms patients experience, showing how illness alters physiological processes and how the body compensates or fails to compensate. By contrast, physiology is the study of normal function, anatomy focuses on structure, and pathology looks at disease-related tissue changes and diagnoses. For example, in diabetes, insufficient insulin disrupts glucose uptake, leading to high blood sugar and dehydration; pathophysiology traces how this molecular defect leads to whole-body dysfunction.