A heartbeat begins in the
A) atrioventricular valve.
B) atrioventricular node.
C) sinoatrial node.
D) right ventricle.
E) left atrium.
Correct Answer:
Verified
Q30: The middle layer of the wall of
Q31: The protein found in red blood cells
Q32: The liquid matrix of blood is
A) interstitial
Q33: The capillary wall consists only of
A) a
Q34: Blood pressure is the force that
A) interstitial
Q36: The widening of blood vessels is
A) vasoconstriction.
B)
Q37: A heart murmur is caused by
A) a
Q38: You are a medical student on rounds
Q39: Diastolic pressure reflects the
A) contraction of the
Q40: The narrowing of blood vessels is
A) vasoconstriction.
B)
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