20 Questions
Which of the following is NOT a need for local tissue blood flow?
Increased heart rate
What are the three mechanisms of control for local blood flow?
Metabolic, humoral, and neural
Which type of control causes rapid changes in local blood flow within seconds to minutes?
Acute control
What is the equation for Ohm's Law?
F = ∆P/R
Which organ has the highest percentage of blood flow?
Liver
What is the main metabolite that causes blood vessels to relax and dilate?
Oxygen
What is the relationship between oxygen availability and blood flow?
As oxygen availability decreases, blood flow increases
Which of the following is NOT a mediator of local blood flow control?
Glucose
What is the main factor that determines organ blood flow?
Metabolic rate
Which type of control involves slow, controlled changes over a period of days, weeks, or months?
Long term control
Which of the following is an example of metabolic control of blood flow?
Reactive Hyperemia
What is the equation for blood flow (F)?
F = ∆P / R
What is autoregulation of blood flow?
Blood flow remains constant despite changes in pressure
Which of the following is a component of acute autoregulation of blood flow?
Myogenic Component
What is the process of angiogenesis?
Formation of new blood vessels
Which hormone acts as a vasoconstrictor?
Angiotensin II
Which of the following substances is released from damaged endothelium to cause vasoconstriction?
Endothelin
Which ion is associated with vasoconstriction?
Calcium
Which tissue controls blood flow through a mechanism called tubuloglomerular feedback?
Kidney
Why are the pressure-flow curves different in tissues with strong autoregulatory control?
Response of a vessel/tissue that reacts to the change in pressure
Test your knowledge on the local and humoral control of blood flow by tissues in Chapter 17. Explore the key needs of tissues for O2 delivery, nutrient supply, CO2 and H+ removal, ion concentrations, and hormone transport. Discover the mechanisms involved in regulating blood flow at the local level.
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