Book excerpt: With this outstanding learning tool, you'll review all the key material from Porth's Essentials of Pathophysiology, 2nd Edition in one concise resource. This work helps you: turn confusion into clarity; detailed review questions address pathophysiologic concepts for all body systems. A range of learning tools tests your knowledge with a variety of question styles. Questions and exercises keyed to the textbook reinforce your understanding. Answers with rationales explain the how and why behind correct responses. The expert coverage you'll find in this Study Guide will help you meet the challenges of important exams and clinical practice with confidence.