CS_MNS

5. These cells have a threshold of -40mV
7. Phase in action potential in contractile cardiac muscle cells where K+ channels are closed L-type Ca2+ channels are open
9. Vessels that can serve as pressure reservoir
12. Muscle that squeezes the veins and help blood go into the opposite direction of gravity
13. A healthy heart sounds like
14. Nervous system that mainly controls the heart rate regulation
15. Type of circulation that sends blood throughout the body
16. difference in the pressure when the heart contracts vs. when it relaxes
17. Bring oxygen rich blood from the lungs to the left atrium
19. Channels present in only cardiac action potentials
20. What is depolarized during the P-wave of ECG?
22. Receptors part of excitation-contraction coupling, present in skeletal and cardiac muscle
23. interval of contraction that is filing the heart with blood

1. Cell layer present in all vessels in the body
2. Present in the lumen of big veins and stop the blood from going in the wrong direction (backwards)
3. Shows the AV nodal delay in ECG
4. Largest number of blood vessels in the body
5. Muscle that allows blood to only move in one direction
6. A mechanism for exchange between blood and interstitial fluid
8. The terminal destination of current flow in the ventricular myocardium
10. Period in which a muscle fiber can't have another action potential
11. Organ responsible for oxygenating blood
18. This circulatory system is closed
21. Fluid in the epicardium that acts as lubricant to prevent friction
22. Domains important for structure of cardiac muscle structure