Sample MCQ #1
Resting membrane potential in ventricular myocardium
A-50 mV
B-70 mV
C+70 mV
D-90 mV
Show Answer & Explanation ▾
✓ Correct Answer: D. -90 mV
RMP of ventricular myocyte is - 90 mv Reference: Ganong, 25 th edition page no.521
Medical Entrance Revision · Physiology
Electrophysiology of the Heart MCQs
Electrophysiology of the Heart is part of the The Cardiovascular System section of Physiology. Practise 53 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
About Electrophysiology of the Heart MCQs
Ventricular resting potential of −90 mV, phase 0 sodium influx, the calcium-balanced plateau and HCN funny current in sinus rhythm headline these Electrophysiology of the Heart MCQs, which test cardiac action potentials as high-yield NEET PG and INI-CET revision.
Sample Electrophysiology of the Heart MCQs with answers
Sample MCQ #2
Repolarization is isolated muscle piece fiber proceeds from
AEpicardium to Endocardium
BEndocardium to Epicardium
CLeft to right
DRight to left
Show Answer & Explanation ▾
✓ Correct Answer: B. Endocardium to Epicardium
In isolated cardiac ventricular muscle cell, the direction of depolarization and repolarization are the same from endocardium to epicardium In whole heart, repolarization proceeds from epicardium to endocardium (opposite in direction to depolarization) Reference: Ganong, 25 th edition page no. 523
Sample MCQ #3
Depolarization of human ventricular muscle starts from
APosterobasal part of ventricle
BLeft side of interventricular septum
CUppermost portion of interventricular septum
DBasal portion of ventricular
Show Answer & Explanation ▾
✓ Correct Answer: B. Left side of interventricular septum
Ventricular depolarization begins from left side of interventricular septum Last parts of the heart to be depolarized are posterobasal portion of the left ventricle, the pulmonary conus, and the uppermost portion of the septum. These are the areas which repolarize first Reference: Ganong, 25 th edition page no. 525
Sample MCQ #4
Which of the following is the function of Hyperpolarizing Cyclic nucleotide (HCN) channel
AConduction of impulse
BGeneration of sinus rhythm
CTo maintain the cytoplasmic hyperpolarization
DTo maintain mitochondrial membrane potential
Show Answer & Explanation ▾
✓ Correct Answer: B. Generation of sinus rhythm
HCN channels are also called funny current channels They are involved in generation of sinus rhythm Reference: Ganong, 25th edition page no.521
Sample MCQ #5
Inward flow of Na + in Heart leads to
APlateau phase
BAction potential
CRepolarization
DNo change
Show Answer & Explanation ▾
✓ Correct Answer: B. Action potential
To be more precise, influx of sodium ions causes depolarization of ventricular action potential. It is usually seen in the form of a rapid upstroke (spike) Reference: Ganong, 25 th edition page no. 521
Sample MCQ #6
Plateau phase of ventricular muscle is d/t opening of
ANa + Channels
BK + Channels
CCa - Na channels
DClosure of K + channels
Show Answer & Explanation ▾
✓ Correct Answer: C. Ca - Na channels
Plateau phase Mainly due to the efflux of potassium ions balanced by influx of calcium ions through calcium channels called as Ca - Na channels Reference: Ganong, 25 th edition page no 521
Sample MCQ #7
Which part shows prepotential followed by action potential?
AVentricles
BPapillary muscle
CPurkinje fibers
DChordae tendini
Show Answer & Explanation ▾
✓ Correct Answer: C. Purkinje fibers
Prepotentials are characteristics of pacemaker tissues in heart Purkinje fibers is one of the latent pacemakers of heart Reference: Ganong, 25 th edition page no. 521
Sample MCQ #8
In cardiac action potential, phase 0 is due to
ANa+ K+ ATPase
BSodium influx
CPotassium influx
DCalcium influx
Show Answer & Explanation ▾
✓ Correct Answer: B. Sodium influx
Phase 0 is the early depolarization characterized by opening of voltage-gated sodium channels leading to sodium influx Reference: Ganong 25 th edition page no. 522
What you can practise in Electrophysiology of the Heart
- 53 Electrophysiology of the Heart MCQs on Electrophysiology, Heart, The Cardiovascular System — each with detailed explanations
- Previous-year question practice across NEET PG, FMGE, INI-CET and NEET SS
- Progress and performance tracking to measure retention
More Physiology topics
Prepare for your exam
NEET PG Question BankTopic-wise MCQs and previous-year questionsINI-CET Question BankTopic-wise MCQs and previous-year questionsFMGE Question BankTopic-wise MCQs and previous-year questionsNEET SS Question BankTopic-wise MCQs and previous-year questionsFree All-India Mock TestsTimed mocks with live leaderboards
Frequently Asked Questions
What do Electrophysiology of the Heart MCQs cover?
Ventricular resting potential of −90 mV, phase 0 sodium influx, the calcium-balanced plateau and HCN funny current in sinus rhythm headline these Electrophysiology of the Heart MCQs, which test cardiac action potentials as high-yield NEET PG and INI-CET revision.
How many Electrophysiology of the Heart questions are there, and which exams do they cover?
MedLadder includes 53 curated MCQs for Electrophysiology of the Heart under Physiology (The Cardiovascular System), covering NEET PG, FMGE, INI-CET and NEET SS preparation.