Chapter 17: Local Control of Blood Flow
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Questions and Answers

Which of the following is NOT a need for local tissue blood flow?

  • CO2 removal
  • Oxygen delivery
  • Increased heart rate (correct)
  • Hormone transport

    • What are the three mechanisms of control for local blood flow?

  • Humoral, neural, and electrical
  • Metabolic, humoral, and electrical
  • Metabolic, humoral, and neural (correct)
  • Metabolic, hormonal, and neural

    • Which type of control causes rapid changes in local blood flow within seconds to minutes?

  • Neural control
  • Long term control
  • Acute control (correct)
  • Humoral control

    • What is the equation for Ohm's Law?

    <p>F = ∆P/R</p> Signup and view all the answers

    Which organ has the highest percentage of blood flow?

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

    What is the main metabolite that causes blood vessels to relax and dilate?

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

    What is the relationship between oxygen availability and blood flow?

    <p>As oxygen availability decreases, blood flow increases</p> Signup and view all the answers

    Which of the following is NOT a mediator of local blood flow control?

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

    What is the main factor that determines organ blood flow?

    <p>Metabolic rate</p> Signup and view all the answers

    Which type of control involves slow, controlled changes over a period of days, weeks, or months?

    <p>Long term control</p> Signup and view all the answers

    Which of the following is an example of metabolic control of blood flow?

    <p>Reactive Hyperemia</p> Signup and view all the answers

    What is the equation for blood flow (F)?

    <p>F = ∆P / R</p> Signup and view all the answers

    What is autoregulation of blood flow?

    <p>Blood flow remains constant despite changes in pressure</p> Signup and view all the answers

    Which of the following is a component of acute autoregulation of blood flow?

    <p>Myogenic Component</p> Signup and view all the answers

    What is the process of angiogenesis?

    <p>Formation of new blood vessels</p> Signup and view all the answers

    Which hormone acts as a vasoconstrictor?

    <p>Angiotensin II</p> Signup and view all the answers

    Which of the following substances is released from damaged endothelium to cause vasoconstriction?

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

    Which ion is associated with vasoconstriction?

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

    Which tissue controls blood flow through a mechanism called tubuloglomerular feedback?

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

    Why are the pressure-flow curves different in tissues with strong autoregulatory control?

    <p>Response of a vessel/tissue that reacts to the change in pressure</p> Signup and view all the answers

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