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Analyzing the Heart with EKG Quiz


Quiz Practice Questions:

1. List the structures that form the electrical conduction system.

2. What is happening during each wave seen on the EKG? (what is contracting/depolarizing or relaxing/repolarizing?)

3. Which is the MOST important factor determining resistance to blood flow in our bodies?

4. When we changed tube radius, what was the result on flow rate? Why?

5. When we changed tube length, what was the result on flow rate? Why?

6. When we changed the pressure difference, what was the result on flow rate? Why?

7. What is viscosity? What might cause a change in blood viscosity or blood vessel length?

8. What is hematocrit?

9. How does hematocrit change viscosity?

10. When we change blood viscosity, what happens to flow rate?

11. Know the equations we covered in lab and how they work.

12. In activities 5&6 we pretended we were the body, trying to hold BP constant, while changing flow. When we increased tube radius, what happened to Hr?

13. When we increased stroke volume, what happened to Hr?

14. What three things affect Stroke Volume? Explain.

15. What is an advantage of slower blood velocity in some areas of the body?

16. Increasing blood pressure can increase flow. Why is increasing blood pressure long term a problem for blood vessels?

17. What is end diastolic volume and how does it contribute to strove volume?

18. What will happen if the pressure created by the heart is the same as the pressure in the arteries (afterload)?

19. What is aortic stenosis? How will it affect preload, afterload and stroke volume.

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