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Bianco's Circulatory system - Blood Vessels and ...

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  • What is the primary function of arteries?
    a) To transport blood back to the heart
    b) To regulate blood pressure
    c) To exchange gases with tissues
    d) To carry blood away from the heart
  • What is the purpose of elastic fibers in arteries?
    a) To regulate blood flow
    d) To prevent blood clotting
    b) To maintain low pressure
    c) To stretch and recoil
  • How do capillaries facilitate nutrient exchange with tissues?
    b) By secreting hormones
    d) By storing excess blood
    a) By contracting and expanding
    c) By having thin walls and high permeability
  • What characteristic distinguishes capillaries from other blood vessels?
    d) Elasticity
    b) Permeability - allowing liquids or gases to pass through
    a) Thick walls
    c) High pressure
  • Which blood vessels carry blood away from the heart?
    c) Veins
    b) Capillaries
    a) Arteries
    d) Arterioles
  • What is the function of capillaries?
    a) To carry blood away from the heart
    d) To regulate blood pressure
    c) To transport blood back to the heart
    b) To exchange nutrients and oxygen with tissues
  • What is the function of veins?
    c) To transport blood back to the heart
    b) To transport blood away from the heart
    d) To regulate blood pressure
    a) To exchange substances with cells
  • Why do veins have valves?
    a) To maintain high pressure
    d) To prevent backward flow of blood
    c) To control the flow of oxygen
    b) To prevent blood clotting
  • What is the primary function of capillaries in the circulatory system?
    a) To regulate blood pressure
    b) To exchange gases and nutrients with tissues
    c) To store excess blood
    d) To carry blood away from the heart
  • Which blood vessels have the thinnest walls?
    c) Veins
    d) Venules
    a) Arteries
    b) Capillaries
  • Which blood vessels have the largest lumens?
    c) Veins
    a) Arteries
    b) Capillaries
    d) Arterioles
  • Why do arteries have thick layers of muscle tissue?
    c) To stretch and recoil
    b) To prevent blood clotting
    d) To bear high pressures
    a) To maintain low pressure
  • What is the main characteristic of arteries?
    c) Single-cell thick walls
    d) Thick, elastic walls
    a) Thin walls
    b) Low pressure
  • What is the typical cross-sectional area of capillaries compared to arteries?
    d) Variable
    a) Smaller
    b) Equal
    c) Larger
  • What is the primary factor influencing the flow rate of blood in capillaries?
    b) Low pressure
    c) Permeability
    a) High pressure
    d) Elasticity
  • What purpose do valves serve in veins?
    a) To increase blood pressure
    d) To prevent backward blood flow
    c) To control the flow of oxygen
    b) To prevent clot formation
  • What is the structure of capillary walls?
    b) Thin and permeable-allowing liquids/gases to pass through
    d) Multilayered
    c) Elastic and stretchy
    a) Thick and muscular
  • What role do veins play in the circulatory system?
    d) They regulate body temperature
    a) They carry blood away from the heart
    b) They exchange gases with tissues
    c) They transport blood back to the heart
  • How do arteries differ from veins in terms of pressure?
    b) Veins have higher pressure
    c) Arteries and veins have equal pressure
    d) Both have low pressure
    a) Arteries have higher pressure
  • How is the flow rate of blood through a vessel calculated?
    c) By dividing the blood volume by the time taken
    d) By multiplying the vessel diameter by the blood pressure
    b) By multiplying the blood pressure by the vessel length
    a) By dividing the blood volume by the vessel diameter
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