Multiple Choice
Which of these statements correctly describes the AV node?
A) It is the normal pacemaker of the heart.
B) It is the only electrical connection between the atria and the ventricles.
C) It rapidly conducts the impulse from the atria to the ventricles so that they contract simultaneously.
D) It is not innervated by the vagus.
Correct Answer:

Verified
Correct Answer:
Verified
Q12: Sympathetic stimulation of the heart increases calcium
Q173: Angina pectoris develops from the abundance of
Q182: Which of these statements correctly describes cardiac
Q186: Which of these statements correctly describes cardiac
Q228: Which of these terms refers to the
Q247: The action potential impulse passes through the
Q262: HDLs have less protein than LDLs.
Q265: Stroke volume is determined by the extent
Q271: An increase in cardiac sympathetic activity _
Q297: The long refractory period of cardiac muscle