Chp 19 – Flashcards
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Which of the choices below does not explain why low capillary pressures are desirable?
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Low blood pressure is more desirable than high blood pressure.
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Which of the following is likely during vigorous exercise?
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Capillaries of the active muscles will be engorged with blood.
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Factors that aid venous return include all except ________.
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urinary output
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Where in the body would you find low oxygen levels causing vasoconstriction and high levels causing vasodilation?
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lungs
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If blood pressure is almost normal in a person who has lost blood, does that mean the tissues are receiving adequate blood flow?
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not necessarily
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Matching
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Site where resistance to blood flow is greatest. - arterioles
Site where exchanges of nutrients and gases are made. - capillaries
Site where blood pressure is greatest. - large arteries
Site where blood volume is greatest. - large veins
Site where the velocity of blood flow is fastest. - large arteries
Site where blood pressure is lowest. - large veins
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Which of the following is true about veins?
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Veins are called capacitance vessels or blood reservoirs.
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Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation?
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tunica media
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Select the correct statement about factors that influence blood pressure.
a. An increase in cardiac output corresponds to a decrease in blood pressure, due to the increased delivery.
b. Excess protein production would decrease blood pressure.
c. Systemic vasodilation would increase blood pressure, due to diversion of blood to essential areas. Incorrect
d. Excess red cell production would cause a blood pressure increase.
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Excess red cell production would cause a blood pressure increase.
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Which of the following processes provides a long-term response to changes in blood pressure?
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renal regulation
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The influence of blood vessel diameter on peripheral resistance is ________.
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significant because resistance is inversely proportional to the fourth power of the vessel radius
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In the dynamics of blood flow through capillaries, hydrostatic pressure ________.
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is the same as capillary blood pressure
