Medical School MD + DO Mastery

A 4-year, board-aligned study system for medical school and licensing exams.

Walk the full Year 1–4 curriculum — foundational sciences, organ-system blocks, clinical clerkships and advanced practice — each with mastery checklists and linked learning resources, plus a dedicated review system for school exams, Shelf/COMAT, USMLE Step 1–3 and COMLEX-USA Levels 1–3.

YEAR 2 SYSTEMS REVIEW - RENAL / URINARY

YEAR 2 | PAGE 47C - GFR / CLEARANCE -> NEPHRON TRANSPORT -> VOLUME / ELECTROLYTES -> ACID-BASE -> URINE / PATHOLOGY

-> DIURETICS RENAL SPINE: RBF / GFR -> SEGMENT TRANSPORT -> MEDULLARY GRADIENT / ADH -> VOLUME / OSMOLALITY -> ELECTROLYTES -> ACID-BASE -> AKI / CKD / GLOMERULAR / STONE PATTERN -> URINE / IMAGING CLUE -> THERAPY TARGET. G. RENAL CLOSED-BOOK REVIEW MAP

LANE	MUST RETRIEVE WITHOUT NOTES	HIGH-DISCRIMINATION TRANSFER
Hemodynamics + clearance	Starling forces; afferent/efferent tone; GFR/RPF/RBF/FF; creatinine/inulin/PAH concepts; autoregulation.	Predict GFR, RPF and FF after vascular or drug perturbation before choosing an answer.
Transport + volume	PCT/loop/DCT/collecting duct transporters; RAAS/ADH/aldosterone; medullary gradient; free-water handling.	Map urine/serum Na/K/H+/Ca/water effects to the segment and hormone or diuretic involved.
Acid-base + electrolytes	Primary metabolic/respiratory process; compensation; anion gap; mixed disorders; K/Na/osmolality logic.	State the primary process and expected compensation before disease-label recognition.
Disease localization	Prerenal/intrinsic/postrenal AKI; CKD; nephritic/nephrotic; interstitial/tubular disease; stones.	Use history + urine sediment/indices + protein/blood + imaging to localize the lesion before naming the disease.

H. TOP 10 MOST-MISSED SYSTEM CONCEPTS - #8 TO #10

# / CONCEPT	DEEP EXPLANATION	WHY STUDENTS MISS IT	EASIEST CLUE
8. Afferent/efferent tone changes GFR and RPF	Afferent tone changes inflow; efferent tone changes outflow pressure. Moderate efferent constriction can preserve/increase	Students memorize ACE-I/NSAID slogans without reconstructing what happens to glomerular	Draw one glomerulus with an inlet and outlet.
differently	GFR while lowering RPF, changing filtration fraction.	pressure and renal plasma flow.
9. Nephron segment predicts diuretic and electrolyte effects	Every diuretic is a transport perturbation at a specific nephron segment. The downstream Na delivery, lumen voltage and hormone responses explain K, H+, Ca/Mg, volume and acid-base effects.	Drug lists are learned separately from renal physiology, making adverse effects look arbitrary.	Ask where does the drug act, and what normally moves there?
10. Localize renal disease before naming it	Prerenal, glomerular, tubular/interstitial and postrenal processes produce different relationships among perfusion, sediment, protein/blood, urine indices, electrolytes and imaging.	Learners jump from creatinine elevation to a disease label and ignore urine evidence.	Use perfusion -> glomerulus -> tubule/interstitium -> obstruction.

I. HIGH-VALUE REVIEW RESOURCES - DIRECT + PLAYABLE

RESOURCE	ROLE IN THIS REVIEW
Ninja Nerd - Glomerular Filtration	Filtration barrier, Starling forces and afferent/efferent perturbations.
Ninja Nerd - Renal Autoregulation	Myogenic + tubuloglomerular feedback; macula densa/JGA logic.
Ninja Nerd - Filtration/Reabsorption/Secretion	Integrated nephron map before diuretics/electrolytes.
Ninja Nerd - Acute Kidney Injury	Prerenal vs intrinsic vs postrenal localization and complications.
Ninja Nerd - Sodium Disorders	Volume-state classification and safe sodium reasoning.
Ninja Nerd - Diuretics	Segment physiology -> drug mechanism -> electrolyte/acid-base consequences.

I. HIGH-VALUE REVIEW RESOURCES - DIRECT + PLAYABLE

SCHOOL-EXAM GATE	BOARD / COMLEX TRANSFER
• Solve GFR/clearance and acid-base problems without a cue sheet. • Map nephron segment to transporter, hormone, drug and lab consequence.	• Mixed question: physiology -> serum/urine pattern -> lesion -> drug/test. • Review low-confidence corrects and repeated acid-base/diuretic misses.
• Read urine microscopy/indices before naming renal pathology. 2026/27 systems-review expanded edition - align with school objectives and verify official exam updates before testing	• Use official self-assessment trends as one readiness signal, not the sole signal.