The apex beat of the heart is synchronous with:

  • A
    First heart sound
  • B
    Second heart sound
  • C
    Third heart sound
  • D
    Fourth heart sound

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Similar Questions

The $SAN$ (Sino-atrial node) can generate action potentials at a rate of:

$A$: The cardiac impulse which originates from $SA$ node in mammalian heart cannot spread directly from atria to ventricles.
$R$: In mammalian heart there is no continuity between cardiac muscle fibres of atria and those of ventricles except $AV$ bundles.

The mitral valve in mammals guards the opening between:

What does the human heart $NOT$ possess?

Which one is the correct route through which the cardiac impulse travels in the heart?

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