CV Physiology

3. What receptors are located in the aortic arch and carotid sinus and cause alterations in BP?
7. The degree of tension on the heart muscle when it begins contraction
11. Isovolumic or isovolumetric contraction is known as ________.
12. What structures carry blood away from the heart and have elastic and muscle fibers in walls?
14. Excess amounts of this ion can cause the heart to become dilated, flaccid, and have a much slower HR.
16. What type of innervation can slow heart rate to almost zero by a release of AcH?
17. At which node does the flow of electricity through the heart begin?
18. The heart mainly produces ATP through what pathways?
20. T/F the heart has intrinsic rhythmicity.

1. What are the microscopic blood vessels that contain ~5% of the total blood volume?
2. T/F Decreased temperature will increase HR, sometimes as much as 2x.
4. What period prevents restimulation of the cardiac muscle?
5. ______ are smooth muscles that can constrict and dilate depending on peripheral blood needs.
6. What can cause the heart to go into spastic contraction?
8. Frank-Starling Mechanism states the heart pumps what the heart ______.
9. What type of innervation can increase cardiac output by 100% and result in tachycardia?
10. What structures carry blood to the heart and only allow flow in one direction?
13. Intercalated ______ allow chemical and electrical coupling between the cells of the heart.
15. Which channels are slower to open than sodium channels and remain open longer during an AP?
19. Oxygen-rich blood enters the heart from the ______ and goes out to the body.