What is a major action of histamine in inflammation?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study for the NATA BOC Domain 2 Clinical Evaluation and Diagnosis Test. Utilize our comprehensive flashcards and multiple-choice quiz features; each question comes with hints and thorough explanations. Prepare effectively for your certification exam!

Multiple Choice

What is a major action of histamine in inflammation?

Explanation:
Histamine released during acute inflammation acts on the microvasculature to cause rapid vasodilation and increased capillary permeability. It primarily does this by binding to receptors on the endothelium, making the vessel walls more permissive to fluid and proteins. The result is increased blood flow to the area and leakage of plasma into the tissue, forming exudate and resulting in edema. This immediate vasodilation and permeability change is the major action of histamine in inflammation. The other ideas—vasoconstriction, inhibition of exudate, or decreased edema—do not fit histamine’s well-established effect.

Histamine released during acute inflammation acts on the microvasculature to cause rapid vasodilation and increased capillary permeability. It primarily does this by binding to receptors on the endothelium, making the vessel walls more permissive to fluid and proteins. The result is increased blood flow to the area and leakage of plasma into the tissue, forming exudate and resulting in edema. This immediate vasodilation and permeability change is the major action of histamine in inflammation. The other ideas—vasoconstriction, inhibition of exudate, or decreased edema—do not fit histamine’s well-established effect.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy