MBBS Study Guide 2026
Everything you need to pass the MBBS exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 MBBS Exam Format at a Glance
📚 MBBS Topics to Study (24)
✍️ Sample MBBS Questions & Answers
1. Which type of edema is caused by increased vascular permeability due to inflammation?
Inflammatory edema is an exudate, characterized by high protein content and specific gravity >1.020, reflecting increased vascular permeability.
2. Which ion is primarily responsible for the pacemaker potential (funny current) in the SA node?
The funny current (If) in SA node pacemaker cells is mainly carried by Na+ influx through HCN channels during hyperpolarization, initiating spontaneous depolarization.
3. What is the normal central venous pressure (CVP) range?
Normal CVP is 2–6 mmHg, reflecting right atrial filling pressure and serving as an estimate of preload.
4. Which genetic mutation is associated with chronic myeloid leukemia (CML)?
CML is characterized by the Philadelphia chromosome, resulting from t(9;22) translocation creating BCR-ABL fusion, a constitutively active tyrosine kinase.
5. Which phase of the cardiac action potential is responsible for the plateau in ventricular myocytes?
Phase 2 (plateau) is caused by sustained Ca2+ influx through L-type calcium channels balanced by K+ efflux, preventing early repolarization.
6. The 'Rule of Nines' is used in burns assessment — what percentage of body surface area does the anterior trunk represent?
In the Rule of Nines, the anterior trunk accounts for 18% of total body surface area (TBSA), equal to the posterior trunk.