Just Prior to Atrial Contraction

question 139

Multiple Choice

Just prior to atrial contraction,

• A) all four chambers are at rest and AV valves are open.
• B) all four chambers are at rest and AV valves are closed.
• C) all four chambers are contracting and all valves are open.
• D) both ventricles are contracting and blood is being ejected into the major arteries.
• E) both atria are contracting and blood is being ejected into the major arteries.

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