Mechanisms of Blood Flow Control
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Questions and Answers

What is the primary mechanism of acute blood flow control?

  • Long-term changes in blood vessel sizes
  • Increase in the number of blood vessels
  • Rapid local vasodilation or vasoconstriction (correct)
  • Changes in oxygen availability

    • Which theory proposes that tissue metabolism influences local blood flow by affecting oxygen availability?

  • Vasodilator Theory
  • Controlled Flow Theory
  • Nutrient Lack Theory
  • Oxygen Lack Theory (correct)

    • What distinguishes long-term control of blood flow from acute control?

  • Maintenance of appropriate local tissue blood flow
  • Physical sizes and numbers of blood vessels (correct)
  • Proportion to the needs of the tissues
  • Speed of changes in flow

    • How do long-term changes in blood vessel sizes and numbers contribute to better control of blood flow?

    <p>By adjusting flow proportionally to tissue needs</p> Signup and view all the answers

    Which component plays a vital role in achieving rapid maintenance of appropriate local tissue blood flow during acute control?

    <p>Metarterioles</p> Signup and view all the answers

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