With over 700 exam-type questions, this comprehensive question & answer review book, is ideal for course review as well as for USMLE Step 1 preparation. All questions have been updated and revised to follow the current USMLE Step 1 format. A bonus practice test is also included.700 exam-type questions and detailed explanations Ideal for course review as well as for USMLE Step 1 preparation100 exam-type bonus practice test for self-assessment Complete review in all areas of physiology Now with improved illustrations and more high-yield facts