-The first heart sound corresponds to point

Name: -The first heart sound corresponds to point
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Question

Quizplus · Accepted Answer

$[\mathrm{V} B]$. The first heart sound corresponds to closure of the atrial-ventricular valves. Before this closure occurs, the ventricle fills (phase $4 \rightarrow 1$ ). After the valves close, isovolumetric contraction begins and ventricular pressure increases (phase $1 \rightarrow 2$ ).

-The First Heart Sound Corresponds to Point