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 (B)</p> Signup and view all the answers

Which organ has the highest percentage of blood flow?

<p>Liver (B)</p> Signup and view all the answers

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

<p>Oxygen (B)</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 (D)</p> Signup and view all the answers

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

<p>Glucose (D)</p> Signup and view all the answers

What is the main factor that determines organ blood flow?

<p>Metabolic rate (C)</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 (D)</p> Signup and view all the answers

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

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

What is the equation for blood flow (F)?

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

What is autoregulation of blood flow?

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

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

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

What is the process of angiogenesis?

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

Which hormone acts as a vasoconstrictor?

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

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

<p>Endothelin (C)</p> Signup and view all the answers

Which ion is associated with vasoconstriction?

<p>Calcium (B)</p> Signup and view all the answers

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

<p>Kidney (A)</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 (D)</p> Signup and view all the answers
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