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17 November 2010

17 November 2010. Diffusion Role of veins Blood volume and blood pressure The Baroreceptor Reflex The Response to Hemorrhage. 1QQ # 29 for 8:30. Fenestrated capillaries are found in The liver The digestive tract Skeletal muscles the brain Endocrine organs

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17 November 2010

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  1. 17 November 2010 Diffusion Role of veins Blood volume and blood pressure The Baroreceptor Reflex The Response to Hemorrhage

  2. 1QQ # 29 for 8:30 • Fenestrated capillaries are found in • The liver • The digestive tract • Skeletal muscles • the brain • Endocrine organs • Smooth muscles in arterioles relax when • Oxygen increases • Carbon dioxide increases • K+ concentration fall • adenosine increases • interstitial osmolarity increases.

  3. 1QQ # 29 for 9:30 • Discontinuous capillaries are found in • The liver • The digestive tract • Skeletal muscles • the brain • The spleen • A change in metabolism that causes a change in blood flow to a vascular bed is called • Flow autoregulation • Mediated transport • Metabolic autoregulation • Myogenic autoregulation • A Starling force.

  4. S 1 Diffusion, vesicle transport, bulk flow, mediated transport

  5. S 2 Fig. 12.40 Diffusion is the most important mode of exchange of nutrients

  6. S 3 Figure 12.44 Veins areCapacitance vessels(high compliance)with valves for unidirectional flow Arteries are low compliance, so any increase in volume increases pressure.

  7. S 4 Fig. 12.53 MAP = CO x TPR Negative feedback control:stimulus, receptors, afferent pathway(s), integrator, efferent pathway(s), effector(s)response(s)

  8. S 5 Fig. 12.54

  9. Story Time S 6 A Neuroscientist in New Orleans

  10. S 7 Test 3 Hemorrhage Diagram One the back side of this page, create a diagram for the following. Your response must be confined to the reverse side of this page and you must write legibly. Your response will count 15-20% of the grade on Test 3 and should require no more than ten minutes to complete at the beginning of the test. Beginning with a loss of about 1 liter of blood from a vein, diagram the early events associated with hemorrhage and the negative feedback responses to hemorrhage in a well-organized diagram. Write legibly! Completeness, accuracy, and detail, together with the proper sequence earn maximal points. The following abbreviations can be used: mAChR, Hct, Q, SV, RBC, HR, EDV, ACh, ANH, ADH, CO, TPR, EPO, VR, MAP, EPI, NE, SAN, aAdR , bAdR, Symp (sympathetic), Parasymp (parasympathetic), PV, r (radius), Pc, fAP (frequency of action potentials.) Any other abbreviations must be defined. "If in doubt, write it out!" Use single headed arrows (→) to indicate sequential relationships and doubled-stemmed arrows to indicate increases or decreases.

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