What occurs when the pressure in the ventricles drops below the pressure of the atria?
A) AV valves open
B) AV valves close
C) SL valves open
D) SL valves close
Correct Answer:
Verified
Q85: The ventricles completely empty when they contract
Q86: What structures keep the AV valves from
Q87: What causes the semilunar valves to close?
A)higher
Q88: Closure of the atrioventricular valves occurs at
Q89: During isovolumetric ventricular relaxation
A)left ventricular pressure exceeds
Q91: During isovolumetric ventricular contraction ventricular pressure is
A)increasing.
B)decreasing.
C)unchanged.
Q92: The amount of blood ejected by the
Q93: The heart spend more time in diastole
Q94: Valves are said to be _ when
Q95: What valve keeps blood from flowing back
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