If you are studying for the USMLE Step 1, COMLEX, or your med school finals, you have likely heard the golden rule: “Physiology is high-yield.” You cannot diagnose disease without understanding the "normal" first.
| System | Kaplan Chapter | Must-Know Concept | | :--- | :--- | :--- | | | Chapter 3 | Pressure-volume loops, cardiac output regulation, baroreceptors | | Renal | Chapter 5 | Starling forces in glomerulus, countercurrent multiplication, acid-base handling | | Respiratory | Chapter 4 | V/Q mismatch, oxygen-hemoglobin dissociation curve, lung volumes | | Endocrine | Chapter 7 | Feedback loops (HPA axis, thyroid), receptor physiology (up/down regulation) | physiology kaplan
❌ Acid-base shows up on every single Step 1 exam. ✅ Instead: Use Kaplan’s Tic-Tac-Toe method for ABGs. Practice 5 problems daily. Final Verdict: Is Kaplan Physiology Enough? Yes for conceptual mastery. If you truly understand Kaplan Physiology, you will answer 90% of Step 1 physiology questions correctly. If you are studying for the USMLE Step