The aortic valve opens
A) when ventricular pressure exceeds aortic pressure
B) just before ventricular systole begins
C) just after the isovolumetric relaxation phase
D) in response to the repolarization of contractile cells in the left ventricle
E) just before atrial diastole begins
Correct Answer:
Verified
Q53: The second heart sound is produced by
Q54: A condition in which the heart is
Q55: The heart is
A)sympathetically innervated via cardiac nerve
Q56: What percentage of ventricular filling is normally
Q57: The first heart sound
A)occurs when the AV
Q59: Vagal influences on the heart result in
A)enhanced
Q60: Which of the following leads to a
Q61: A swishy murmur heard between the second
Q62: The cardiac muscle
A)extracts oxygen and nutrients from
Q63: Increased _ permeability of nodal cells hyperpolarizes
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