10. VENOUS FLOW MAY SHOW ALL OF THE FOLLOWING EXCEPT ONE A. STEADY TYPE B. PULSATILE TYPE C. PHASIC TYPE D. LOW RESISTANT TYPE 11 ONE OF THE FOLLOWING IS NOT TRUE CONCERNING THE
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1. In the coronary circulation: (a) Overall, left coronary arterial flow is lower than right coronary arterial flow. (b) Venous flow rate during diastole exceeds that during systole. (c) Left coronary arterial flow occurs mainly during diastole. (d) Right coronary arterial flow is fully interrupted during systole. (e) A reduction in arterial O2 in a coronary arteriole leads to vasoconstriction. 2. Lymph: (a) Flow rate is approximately 1.2 L/hr. (b) It is primarily produced in the brain. (c) Lymph vessels are contractile. (d) Lymph flows from the chest into the abdomen. (e) Flow rate is increased following a hemorrhage.
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33) Oxygen and carbon dioxide are transported between the blood and interstitial fluid by way of A) exocytosis and endocytosis by endothelial cells. B) pinocytosis using fluid-filled vesicles. C) diffusion from areas of higher concentration to lower concentration. D) active transport (using ATP) by protein carriers of endothelial cells. 34) Which statement concerning capillary dynamics is accurate? A) Filtration dominates at the arterial end of a capillary bed and is driven by osmotic pressure. B) Filtration dominates at the arterial end of a capillary bed and is driven by hydrostatic pressure. C) Filtration dominates at the venous end of a capillary bed and is driven by osmotic pressure. D) Filtration dominates at the venous end of a capillary bed and is driven by hydrostatic pressure. 35) Which statement accurately describes total blood flow? A) Total blood flow equals cardiac output and is a fixed number given that there is a finite amount of blood in the body. B) Changes in total blood flow are accompanied by equivalent changes in local blood flow in all areas of the body C) Total blood flow is measured as the sum of blood flow to upper and lower extremities and is measured in liters. D) Total blood flow is measured as the sum of blood flow to upper and lower extremities and is measured in beats per minute. E) Total blood flow equals cardiac output and can vary significantly over time with activity levels. 36) Mr. Jones, en route to the hospital emergency room by ambulance, is in fibrillation. What is his cardiac output likely to be? A) high, because his heart rate is elevated. B) low, because the ventricles are not pumping effectively C) high, because the cardioacceleratory center is in control D) low, because the cardioinhibitory center is in control 37) Peripheral resistance is A) directly related to both vessel length and radius. B) inversely related to both vessel length and radius. C) directly related to vessel length and inversely related to vessel radius. D) inversely related to vessel length and directly related to vessel radius.
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