1a : the act or action of grasping with the intellect : understanding children who have difficulty with comprehension of spoken language What the artist actually needs is comprehension of his aims and ideals by men he respects â¦ â H. L. Menckenb : knowledge gained by comprehending tests that measure the students' comprehension in math She carried on ...
The inflammatory response (inflammation) occurs when tissues are injured by bacteria, trauma, toxins, heat, or any other cause. The damaged cells release chemicals including histamine, bradykinin, and prostaglandins. These chemicals cause blood vessels to leak fluid into the tissues, causing swelling.
It is thought to be a major mediator of the acute. inflammatory response, although histamine H1. antagonists have little effect on acute inflammation. [5]. Histamine playes a pivotal role in many types of. allergic and inflammatory processes, including both. acute and delayed hypersensitivity reactions [5]. The source of histamine in such cases is tissue mast cells. The magnitude of such problems depends on the route of exposure (local versus systemic), sites of exposure (e.g. inhaled versus cutaneous), the dose of allergen, and the degree of previous sensitization to the allergen.