Understanding Local Control of Resistance Vasculature and Microcirculation
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Questions and Answers

Which type of control of organ blood flow is exerted by factors within the organ itself?

  • Acute control
  • Long-term control
  • Intrinsic control (correct)
  • Extrinsic control

    • Which theory of metabolic control suggests that the release of vasodilator substances in response to increased tissue metabolism leads to increased blood flow?

  • Oxygen demand theory
  • Autoregulation theory
  • Myogenic theory
  • Vasodilator theory (correct)

    • Which substances play a role in the metabolic control of blood flow to specific tissues?

  • pH and adenosine (correct)
  • PO2 and PCO2
  • cAMP and cGMP
  • K+ and nitric oxide

    • Which of the following is NOT a mechanism of blood flow control?

    <p>Humoral Control</p> Signup and view all the answers

    Which of the following is NOT a special example of metabolic control of blood flow?

    <p>Tubuloglomerular Feedback</p> Signup and view all the answers

    Which of the following is NOT a factor that influences vascular smooth muscle signal transduction?

    <p>Anions (Acetate &amp; Citrate)</p> Signup and view all the answers

    Which of the following is NOT a mechanism of chronic control of blood flow?

    <p>Changes in arterioles, metarterioles, and precapillary sphincters</p> Signup and view all the answers

    Which of the following substances is NOT a vasoconstrictor?

    <p>Nitric oxide</p> Signup and view all the answers

    Which of the following is a special mechanism for acute blood flow control in the brain?

    <p>CO2 and H+</p> Signup and view all the answers

    Which of the following is NOT a characteristic of extrinsic control of organ blood flow?

    <p>It is responsible for long-term regulation of blood flow.</p> Signup and view all the answers

    Which of the following is a characteristic of myogenic regulation of blood flow?

    <p>It is independent of changes in blood pressure.</p> Signup and view all the answers

    Which of the following substances is NOT involved in the metabolic control of blood flow to specific tissues?

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

    Which of the following is NOT a characteristic of autoregulation of blood flow?

    <p>It is mediated by vasoconstrictor substances</p> Signup and view all the answers

    Which of the following substances is NOT involved in the metabolic control of blood flow to specific tissues?

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

    Which of the following is a characteristic of myogenic regulation of blood flow?

    <p>It helps to maintain constant blood flow to an organ</p> Signup and view all the answers

    Which of the following is a mechanism of acute control of blood flow?

    <p>Vasodilator theory</p> Signup and view all the answers

    Which of the following substances is NOT involved in the metabolic control of blood flow to specific tissues?

    <p>Carbon dioxide</p> Signup and view all the answers

    Which of the following is a special mechanism for acute blood flow control in the kidneys?

    <p>Tubuloglomerular feedback</p> Signup and view all the answers

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