NEET-UG Biology · Class 11
Cardiac cycle, output and heart tracings — NEET & JEE Questions
Cardiac cycle, output and heart tracings is a topic in Body Fluids and Circulation, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 16 published NEET-UG questions on Cardiac cycle, output and heart tracings, each with the marking scheme of the real paper.
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Cardiac cycle, output and heart tracings MCQs with solutions
10 of the 16 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
The P wave of a normal ECG primarily represents:
- A. ventricular repolarisation
- B. atrial repolarisation only
- C. atrial depolarisation
- D. ventricular depolarisation
The QRS complex primarily represents:
- A. ventricular repolarisation
- B. SA-node firing only
- C. ventricular depolarisation
- D. atrial depolarisation
What does the P wave of a normal ECG represent?
- A. Atrial depolarisation
- B. Ventricular depolarisation
- C. Ventricular repolarisation
- D. Atrial mechanical relaxation only
The approximate duration of one cardiac cycle at 75 beats per minute:
- A. 0.8 s
- B. 0.2 s
- C. 5 s
- D. 1.5 s
Cardiac output equals:
- A. blood pressure times body mass
- B. stroke volume divided by heart rate
- C. heart rate multiplied by stroke volume
- D. pulse pressure divided by time
At a heart rate of about 72 beats per minute, approximately how long is one complete cardiac cycle?
- A. 0.1 second
- B. 0.8 second
- C. 0.3 second
- D. 1.5 seconds
Which valve event produces the first heart sound, commonly written as 'lub'?
- A. Opening of the atrioventricular valves
- B. Closure of the semilunar valves
- C. Closure of the atrioventricular valves
- D. Opening of the semilunar valves
A person has a stroke volume of 70 mL and a heart rate of 75 beats per minute. What is the approximate cardiac output?
- A. 145 mL per minute
- B. 0.525 L per minute
- C. 52.5 L per minute
- D. 5.25 L per minute
Match List I with List II : List - I List - II A. P wave (i) Heart muscles are electrically silent. B. QRS complex (ii) Depolarisation of ventricles. C. T wave (iii) Depolarisation of atria. D. T-P gap (iv) Repolarisation of ventricles. Choose the correct answer from the options given below :
- A. A-I, B-III, C-IV, D-II
- B. A-III, B-II, C-IV, D-I
- C. A-II, B-III, C-I, D-IV
- D. A-IV, B-II, C-I, D-III
Match List-I with List-II. List - I (ECG) List - II (Electrical activity of heart) (A) P-wave (I) Depolarisation of ventricles (B) QRS complex (II) End of systole (C) T wave (III) Depolarisation of atria (D) End of T wave (IV) Repolarisation of ventricles Choose the correct answer from the options given below :
- A. A-(IV), B-(I), C-(III), D-(II)
- B. A-(I), B-(IV), C-(III), D-(II)
- C. A-(IV), B-(III), C-(I), D-(II)
- D. A-(III), B-(I), C-(IV), D-(II)
Common mistakes in Cardiac cycle, output and heart tracings
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Assuming every ECG abnormality reflects failure of ventricular depolarisation.
- Using valve closure as the starting clue and overlooking the preceding atrial contraction.
- Adds heart rate and stroke volume instead of multiplying them.
- Confuses the QRS complex with the P wave or T wave.
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