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Body Fluids and Its Circulation question

2013 · Q3
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Body Fluids and Its Circulation question

2013 · Q3

NEETBiologyBody Fluids and Its CirculationMCQ+4 / −1
The diagram given here is the standard ECG of a normal person. The P-wave represents the
NEET 2013 Biology - Body Fluids and Its Circulation Question 54 English
  1. A
    beginning of the systole
  2. B
    end of systole
  3. C
    contraction of both the atria
  4. D
    initiation of the ventricular contraction.
View written solutionFree

Correct answer: C

NEET 2013 Biology - Body Fluids and Its Circulation Question 54 English Explanation
The P-wave represents the electrical excitation (or depolarisation) of the atria, which leads to the contraction of both the atria. The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction. The contraction starts shortly after Q and marks the beginning of the systole.

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