When the SA node is not working correctly, the heart has a backup pacemaker called the ____________________ .
A) coronary sulcus
B) chorda tendinea
C) atrioventricular (AV) node
D) His-Purkinje system
Correct Answer:
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Q17: Which of the following means a formation
Q18: What type of heart tissue is responsible
Q19: A typical adult male heart weighs approximately
Q20: In the heart, the mid-sagittal plane is
Q21: What is the purpose of the heart
Q23: The process of creating a(n)_can only occur
Q24: Veins carry what type of blood back
Q25: Within the four heart chambers, the _
Q26: Blood pressure, vascular resistance, and body temperature
Q27: Which of the following decreases blood flow
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