When the ventricular walls contract, Multiple Choice the tricuspid valve opens and the mitral valve closes. the mitral valve opens and the tricuspid valve closes. the mitral and tricuspid valves open. the mitral and tricuspid valves close.
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This would require the atrioventricular valves (tricuspid and mitral valves) to close, preventing blood from flowing back into the atria. Show more…
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