HST NHA ECG CV Test Review
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42 Terms
1. Which chamber pumps blood to the lungs?
right ventricle
2. Which chamber pumps blood to the body?
left ventricle
3. Which valve prevents backflow of blood into left atrium?
mitral (bicuspid) valve
4. Which valve prevents backflow of blood into right atrium?
tricuspid valve
5. Which valve prevents backflow of blood into left ventricle?
aortic valve
6. Which valve prevents backflow of blood into right ventricle?
pulmonary valve
7. Which blood vessel is the site of gas, nutrients, hormone, and waste exchange between the blood and the cells.
capillaries
8. What’s the difference between pulmonary and systemic circulation?
Pulmonary Circulation transports blood between the heart and lungs. Systemic Circulation supplies oxygenated blood to the body's tissues
9. What is coronary circulation?
the heart requires a dedicated blood supply
10. What artery is known as the "widow maker" when severely blocked?
Left Anterior Descending (LAD) Artery
11. What’s the difference between depolarization and repolarization?
Depolarization is electrical stimulation causing contraction. Repolarization is electrical recovery.
12. What is the natural pacemaker of the heart? What does it do? What is its rate range?