10 Questions
Hyperemia is an active process in which ______ dilation leads to increased blood flow.
arteriolar
Affected tissues turn red (erythema) because of increased delivery of ______ blood.
oxygenated
Congestion is a passive process resulting from reduced venous outflow of blood from a ______.
tissue
Congested tissues have an abnormal blue-red color (cyanosis) that stems from the accumulation of ______ hemoglobin in the affected area.
deoxygenated
In long-standing chronic passive congestion, the associated chronic ______ may result in ischemic tissue injury and scarring.
hypoxia
Which of the following is an accurate description of hyperemia?
It is a process that leads to increased blood flow due to arteriolar dilation.
What is the underlying mechanism of congestion?
Reduced venous outflow of blood
What causes the abnormal blue-red color (cyanosis) in congested tissues?
Accumulation of deoxygenated hemoglobin
What can chronic passive congestion lead to?
Ischemic tissue injury and scarring
What can capillary rupture in chronically congested tissues lead to?
Small hemorrhagic foci
Study Notes
Hyperemia and Congestion
- Hyperemia is an active process involving arteriolar dilation, leading to increased blood flow.
- In hyperemia, affected tissues turn red (erythema) due to increased delivery of oxygenated blood.
- Congestion is a passive process resulting from reduced venous outflow of blood from a specific area.
- Congested tissues exhibit an abnormal blue-red color (cyanosis) due to the accumulation of reduced hemoglobin in the affected area.
- Long-standing chronic passive congestion can lead to ischemic tissue injury and scarring due to associated chronic hypoxia.
- Chronic passive congestion can cause capillary rupture, leading to hemorrhage and edema in affected tissues.
Test your knowledge on hyperemia and congestion with this quiz! Learn about the differences in underlying mechanisms and consequences, and understand how these conditions affect tissues.
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