Multiple Choice
Normal heart sounds are caused by which of the following events?
A) opening and closing of the heart valves
B) friction of blood against the chamber walls
C) closure of the heart valves
D) excitation of the SA node
Correct Answer:

Verified
Correct Answer:
Verified
Q46: As pressure in the aorta rises due
Q74: The valve of the heart has three
Q75: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2806/.jpg" alt=" Figure 18.1Using Figure
Q76: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2806/.jpg" alt=" Figure 18.1Using Figure
Q78: Isovolumetric contraction _.<br>A) occurs immediately after the
Q80: The term for pain associated with deficient
Q81: The "lub" sounds of the heart are
Q82: Which vessel(s) of the heart receive(s) blood
Q83: A foramen ovale .<br>A) connects the two
Q84: If cardiac muscle is deprived of its