🧪 Zoology MCQ Quiz Hub

1.  ECG (Electrocardiogram) was developed first by
 Wilhelm His
 Steward
Hubert Mann
Willem Einthoven

2. This is the classic ECG change in MI (myocardial infarction)
ST-segment elevation
 T-wave inversion
Development of an abnormal Q wave
All of these

3.  In which of these conditions can widen QRS and Tall-tented T waves be observed?
 Hyponatremia
Hyperkalemia
Hyperglycemia
Hyperphosphatemia

4.  A particular ECG change observed in Hypokalemia is
 ST segment elevation
U wave (a position deflection after the T wave)
Tall peaked T waves
Widening of the QRS complex and increased amplitude

5. ECG report must consist of the following information
Rhythm, cardiac axis
Conduction intervals
 Description of the ST segments, QRS complexes, T-waves
All of these

6. For the normal heartbeat, depolarization stimulus originates in
His-bundle areas
Epicardium
Sinoatrial (SA)node
Atrioventricular (AV) node

7.  The characteristics – slurring of the initial QRS deflection, shortened PR interval, and prolonged QRS duration are of this condition
Atrial tachycardia
 Left bundle branch block
WPW (Wolff-Parkinson-White) syndrome
Myocardial ischemia

8.  P wave indicates
Depolarization of right ventricle
Depolarization of left ventricle
Depolarization of both atria
Atria to ventricular conduction time

9. Ventricular muscle depolarization is indicated by
 PR interval
P wave
U wave
 The QRS complex

10.  ECG identified by the PR interval tends to become longer with every succeeding ECG complex until there is a P wave not followed by a QRS is observed in
 Third-Degree Atrioventricular Block
Second-Degree Atrioventricular Block, Type II
Second-Degree Atrioventricular Block, Type I
First-Degree Atrioventricular Block, Type II

11. ECG is used for examination of?
heart                        
kidney
LUNGS           
BRAIN

12. In ECG relaxation of ventricles is represented by?
P-wave  
 T wave
U wave          
QRS complex

13. What does lengthening of P wave indicate
Myocardial infraction   
Enlargement of atria
Ventricular enlargement  
Hyperkalamia

14. What happens if T wave becomes wider?
CONDUCTION Abnormalities        
insufficient oxygen to heart
hyperkalamia 
myocardial ischemia

15. What does elevated ST segment represents?
insufficient oxygen    
 acute myocardial infraction
Rheumatic fever         
 ischemia

16. What does enlarged R wave indicate?
enlarged atria   
Rheumatic fever
Coronary artery disease       
none of the above

17. Which of the following statement is NOT true?
P wave indicate atrial contraction
depressed ST segment indicate hyperkalamia
 T wave represents ventricular repolarization
QRS complex represents ventricular depolarization

18. ECG was first developed by?
Steward            
Willem Einthoven
Koch  
 Hubbert Mann

19. Which of the following is the part of ECG?
QRS complex  
ST segment
T wave      
All of the above

20. This is the classic ECG change in MI (myocardial infarction)
ST-segment elevation
T-wave inversion
Development of an abnormal Q wave
All of these

21.  In which of these conditions can widen QRS and Tall-tented T waves be observed?
Hyponatremia
Hyperkalemia
Hyperglycemia
Hyperphosphatemia

22.  A particular ECG change observed in Hypokalemia is
ST segment elevation
U wave (a position deflection after the T wave)
 Tall peaked T waves
 Widening of the QRS complex and increased amplitude

23. ECG report must consist of the following information
Rhythm, cardiac axis
Conduction intervals
Description of the ST segments, QRS complexes, T-waves
All of these

24. For the normal heartbeat, depolarization stimulus originates in
His-bundle areas
Epicardium
Sinoatrial (SA)node
 Atrioventricular (AV) node

25. The characteristics – slurring of the initial QRS deflection, shortened PR interval, and prolonged QRS duration are of this condition
Atrial tachycardia
Left bundle branch block
WPW (Wolff-Parkinson-White) syndrome
Myocardial ischemia

26.  P wave indicates
Depolarization of right ventricle
 Depolarization of left ventricle
 Depolarization of both atria
Atria to ventricular conduction time

27. Ventricular muscle depolarization is indicated by
PR interval
 P wave
U wave
The QRS complex

28. ECG identified by the PR interval tends to become longer with every succeeding ECG complex until there is a P wave not followed by a QRS is observed in
 Third-Degree Atrioventricular Block
Second-Degree Atrioventricular Block, Type II
Second-Degree Atrioventricular Block, Type I
First-Degree Atrioventricular Block, Type II