Connect disease mechanisms to clinical clues, distinguish selected pathogens, interpret nutritional and laboratory patterns, and apply physiology and drug molecular targets across all 11 weighted Step 1 system categories. These are independent learning materials, not official exam questions or a pass prediction.
Read the USMLE Step 1: Mechanisms, Clinical Clues, and Applied Reasoning study guide and official exam sourcesExam outline and official sources
USMLE program, jointly owned by the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners (NBME) · USMLE Content Outline (2026), supplemented by the live Step 1 Content Specifications retrieved on 2026-10-09. The live specifications display no explicit revision or effective date. The linked Physician Tasks/Competencies document carries copyright 2025. The workbook label maps directly to the official Step 1 examination; the assigned slug is preserved.
This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.
- About the USMLE
- Step 1
- Step 1 Exam Content
- USMLE Content Outline (2026)
- USMLE Physician Tasks/Competencies
- Test Delivery Software Updates for Step 2 CK and Step 1 Coming in May 2026
- CDC: Milestones by 18 Months
- CDC: Milestones by 2 Years
- MedlinePlus Genetics: Sickle Cell Disease
- MedlinePlus Genetics: Chronic Granulomatous Disease
- MedlinePlus Genetics: Huntington's Disease
- MedlinePlus Genetics: Parkinson's Disease
- NIAMS: Rheumatoid Arthritis
- NIAMS: Osteoporosis
- NIH Office of Dietary Supplements: Vitamin D—Health Professional Fact Sheet
- NHLBI: Atherosclerosis
- NHLBI: What Is Asthma?
- NHLBI: Asthma Diagnosis
- MedlinePlus Genetics: Polycystic Kidney Disease
- NIDDK: Nephrotic Syndrome in Adults
- NIDDK: Definition and Facts for Celiac Disease
- NIDDK: Graves' Disease
- NIDDK: Hyperthyroidism
- NIDDK: Definition and Facts of Adrenal Insufficiency and Addison's Disease
- NIDDK: Diagnosis of Adrenal Insufficiency and Addison's Disease
- MedlinePlus Genetics: Androgen Insensitivity Syndrome
- MedlinePlus Genetics: Marfan Syndrome
- MedlinePlus Genetics: Cystic Fibrosis
- CDC Principles of Epidemiology: Lesson 5, Appendix A
- AHRQ: Tool—Teach-Back
- AHRQ: Address Language Differences—Tool 9
- Johns Hopkins Medicine Biomarker Discovery in Parkinson's Disease (U01) | PDBP
- GINA-Summary-Guide-2026-WEB-WMS.pdf
- Thyroiditis | American Thyroid Association
- Sickle Cell Disease - Causes and Risk Factors | NHLBI, NIH
- Psychiatry.org - What Are Bipolar Disorders?
- bipolar.pdf
- CV Physiology | Regulation of Stroke Volume
- Celiac Disease Tests - NIDDK
- JCI - HLA-DQ2 and -DQ8 signatures of gluten T cell epitopes in celiac disease
- Hereditary spherocytosis: MedlinePlus Genetics
- Pyruvate kinase deficiency: MedlinePlus Genetics
- VFEND® (voriconazole) 12 CLINICAL PHARMACOLOGY | Pfizer Medical - US
- Community Case of Methicillin-resistant Staphylococcus aureus Infection - Volume 12, Number 1—January 2006 - Emerging Infectious Diseases journal - CDC
- These highlights do not include all the information needed to use Albuterol Sulfate HFA safely and effectively. See full prescribing information for Albuterol Sulfate HFA. Albuterol Sulfate HFA Inhalation Aerosol FOR ORAL INHALATION Initial U.S. Approval: 1981
- 009175Orig1s048lbl.pdf
United States Medical Licensing Examination (USMLE) Step 1
Start with 20 free questions, then review the explanations and any topics you missed.
An 18-month-old walks independently and attempts “mama,” “dada,” and one additional word. The parent is concerned about language development. Which interpretation is most appropriate?
United States Medical Licensing Examination (USMLE) Step 1
Flashcards
Human Development
Developmental language assessment
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