Vagal influences on the heart result in
A) enhanced calcium permeability at the SA node
B) enhanced potassium permeability at the SA node
C) less frequent depolarization of the SA node
D) both a and b
E) both b and c
Correct Answer:
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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
Q58: The aortic valve opens
A)when ventricular pressure exceeds
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
Q64: Sympathetic stimulation of the heart
A)increases the heart
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