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1. Which of the following is unique to cardiac muscle cells?
 
 
 
 

Question 1 of 8

2. The influx of which ion accounts for the plateau phase?
 
 
 
 

Question 2 of 8

3. Which portion of the ECG corresponds to repolarization of the atria?
 
 
 
 

Question 3 of 8

4. Which component of the heart conduction system would have the slowest rate of firing?
 
 
 
 

Question 4 of 8

5. Critical Thinking: Why is the plateau phase so critical to cardiac muscle function?

Question 5 of 8

6. Critical Thinking: How does the delay of the impulse at the atrioventricular node contribute to cardiac function?

Question 6 of 8

7. Critical Thinking: How do gap junctions and intercalated disks aid contraction of the heart?

Question 7 of 8

8. Critical Thinking: Why do the cardiac muscles cells demonstrate autorhythmicity?

Question 8 of 8