The heart's valves open and close in response to changes in
A) oxygenation.
B) sodium and potassium concentration.
C) pressure.
D) the heart's pacemaker.
Correct Answer:
Verified
Q6: Pericardial fluid
A)decreases friction of the pericardial layers
Q7: The valve that separates the right atrium
Q8: The second heart sound (S2)is associated with
Q9: The first heart sound (S1)is associated with
Q10: Through which structure must blood travel in
Q12: Which of the following statements about the
Q13: The heart valve found at the opening
Q14: What causes heart sounds?
A)Blood traveling through the
Q15: The normal heart is the size of
Q16: Which heart chamber delivers oxygenated blood to
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