When an allergic individual is exposed to a sensitizing allergen, the body makes a specific IgE, one that is able to recognize only that allergen. (see above chart). Millions of mast cells and basophils are all over the body.
Urban morphology is the study of the form of human settlements and the process of their formation and transformation. The study seeks to understand the spatial structure and character of a metropolitan area, city, town or village by examining the patterns of its component parts and the process of its development.
urban - located in or characteristic of a city or city life; urban property owners; urban affairs; urban manners. Antonyms: rural - living in or characteristic of farming or country life; rural people; large rural households; unpaved rural roads; an economy that is basically rural. Legal Dictionary. URBAN. Relating to a city; but in a more general sense it signifies relating to houses. 2. It is used in this latter sense in the civil code of Louisiana, articles 706 and 707. All servitudes are established either for the use of houses or for the use of lands. Those of the first kind are called urban servitudes, whether the buildings to which they are due be situated in the city or in the country.