All of the following are true regarding vasodilation in acute inflammation, except:
Correct Answer: First affects capillaries and followed by opening of aerioles
Description: Transient vasoconstriction of aerioles at the site of injury is the earliest vascular response in acute inflammation. This process is mediated by both neurogenic and chemical mediator systems and usually resolves within seconds to minutes. Followed by, Vasodilation first involves the aerioles and then leads to the opening of new capillary beds in the area. There is increased permeability of the microvasculature, with the outpouring of protein-rich fluid into the extravascular tissues. Engorgement of small vessels with slowly moving red cells, results in stasis. Vasodilation is induced by the action of several mediators, notably histamine, on vascular smooth muscle. Vasodilation is responsible for heat (calor) and redness (rubor) at the site of inflammation.
Category:
Pathology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now