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Understanding Cardiovascular Physiology: Control and Regulation

Explore the intricate mechanisms of cardiovascular function, including cardiac output control, blood flow dynamics, and vascular regulation. Learn about essential concepts like Starling's Law, Poiseuille's Law, and the effects of sympathetic and parasympathetic activity on heart rate. Gain insight into the lymphatic system and its role in fluid balance.

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Understanding Cardiovascular Physiology: Control and Regulation

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  1. Bio 449 Lecture 20 - Cardiovascular Physiology III Oct. 15, 2010 Readings Lectures 18-20: Chapter 14 & 15 Lectures 21-22: Chapter 17 Heart (cont’d) Cardiac output (conclusion) Control of cardiac output Blood flow Vessel size, blood velocity and pressure Control of blood distribution Poiseuille's Law Local vs. systemic effects of vasoconstriction Regulation of arteriolar diameter Capillary function Lymphatic system Terms to Know Starling's Law of the Heart Poiseuille's LawViscosity Total peripheral resistance (TPR)Mean arterial pressure (MAP)Central venous pressure (CVP) VasodilationVasoconstriction Active hyperemiaNitric oxide UltrafiltrateLymphLymphatic systemLymphatic vesselsEdema

  2. Control of Cardiac Output

  3. Effects of sympathetic activity on HR Fig. 14-16

  4. Effects of parasympathetic activity on HR Fig. 14-16

  5. Starling’s Law Fig. 14-28

  6. Blood Flow Vessel size, blood velocity and pressure

  7. BP levels throughout circulatory system Fig. 15-5

  8. BP levels throughout circulatory system Fig. 15-5

  9. Control of blood distribution

  10. Fig. 15-14

  11. Poiseuille’s Law

  12. Local vs. systemic effects of vasoconstriction

  13. Regulation of arteriolar diameter

  14. Capillary function

  15. Movement across capillary walls Similar to Fig. 15-17

  16. Lymphatic system

  17. Lymph capillary Overlapping endothelial cells Interstitial fluid Lymph

  18. Uptake of lymph Venule Arteriole Netfiltration Netabsorption Lymphvessels Fig. 15-19

  19. Lymphatic system Thymus Lymph fluid empties into superior vena cava. Spleen Blind-end lymphcapillaries Lymph nodes Fig. 15-19

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