What is the cause of the heart sounds "lubb-dupp"?
A) Closing of the heart valves
B) Flow of blood through the coronary arteries
C) The electrical signal as it moves through the AV node
D) The firing of the autonomic nerves to the SA node
Correct Answer:
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Q19: The pacemaker of the heart is located
Q20: The right ventricle pumps blood to the
A)right
Q21: The correct sequence is: Blood flows from
Q22: Which of the following is a result
Q23: Which of the following is not true
Q25: Which cavity first receives unoxygenated blood from
Q26: The Purkinje fibers
A)open valves.
B)pull on the cusps
Q27: The purpose of this structure is to
Q28: Under what condition is blood most likely
Q29: Which layer of the heart also lines
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