Sympathetic stimulation of the heart causes the heart rate to
A) increase.
B) decrease.
C) stay the same.
D) increase,then decrease.
Correct Answer:
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Q39: The second heart sound,"dup," is caused by
Q40: In an ECG,the T wave represents
A)depolarization of
Q41: The amount of blood pumped out of
Q42: The cardioregulatory center is located in the
A)cerebrum.
B)cerebellum.
C)medulla
Q43: Which chambers contract simultaneously?
A)Two atria
B)Right atrium and
Q45: When is the first sound of the
Q46: Parasympathetic stimulation of the heart causes the
Q47: A heart rate above 100 beats per
Q48: An increase in heart rate would _
Q49: During atrial systole,the AV valves are _
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