Vasoactive amines, involved in inflammation are –
**Core Concept**
Histamine and serotonin are vasoactive amines that play crucial roles in the inflammatory response, mediating vasodilation, increased vascular permeability, and smooth muscle contraction. These amines are released from mast cells and platelets, contributing to the pathophysiology of allergic reactions and inflammation.
**Why the Correct Answer is Right**
Histamine acts on H1 receptors to cause vasodilation and increased vascular permeability, leading to edema and the classic symptoms of allergic reactions, such as itching and wheezing. Serotonin, on the other hand, acts on smooth muscle to cause contraction, contributing to bronchoconstriction and gastrointestinal motility changes. Both amines play key roles in the inflammatory response, making them essential mediators of the body's response to injury.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify a vasoactive amine involved in inflammation.
**Option B:** This option is incorrect as it does not accurately describe the role of vasoactive amines in inflammation.
**Option C:** This option is incorrect as it does not specify a vasoactive amine involved in inflammation.
**Clinical Pearl / High-Yield Fact**
Remember that histamine and serotonin are key players in the inflammatory response, and their release from mast cells and platelets contributes to the pathophysiology of allergic reactions and inflammation. Understanding the roles of these vasoactive amines is essential for diagnosing and managing conditions such as anaphylaxis and asthma.
**Correct Answer: C. Histamine and serotonin.**