The tricuspid valve is closed:
A. during the rapid filling of the ventricles
B. when the mitral valve is closed
C. while the atria are contracting
D. during the ejection of blood from the ventricles
I think the answer is A but not completely sure.
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How can the blood go from the atriums to the ventricles, if the tricuspid valve is closed? However, I think both B and D are correct. If blood is being ejected from the ventricles, both the mitral valve and the tricuspid valve need to be closed to prevent blood from returning to the atria.
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