Book excerpt: "Guyton and Hall Physiology Review is the ideal way to prepare for class exams as well as the physiology portion of the USMLE Step 1. More than 1000 board-style questions and answers allow you to test your knowledge of the most essential, need-to-know concepts in physiology. Includes thorough reviews of all major body systems, with an emphasis on system interaction, homeostasis, and pathophysiology. Designed as a companion to the 13th edition of Guyton and Hall textbook of Medical Physiology, highlighting essential key concepts and featuring direct page references to specific questions." --