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Questions and Answers
What is the primary mechanism of acute blood flow control?
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?
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?
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?
How do long-term changes in blood vessel sizes and numbers contribute to better control of blood flow?
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Which component plays a vital role in achieving rapid maintenance of appropriate local tissue blood flow during acute control?
Which component plays a vital role in achieving rapid maintenance of appropriate local tissue blood flow during acute control?
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