As degranulation occurs, it causes the mast cell or basophil to release a series of chemicals that orchestrate the allergic reaction. Within every mast cell or basophil are 500 to 1500 granules containing more than thirty different allergy-causing chemicals.
Urban design is an inter-disciplinary subject that unites all the built environment professions, including urban planning, landscape architecture, architecture, civil and municipal engineering.
An interior designer may specialize in commercial or residential design or be involved in both. Two new and emerging areas of interior design are green design and ergonomic design. In ergonomic design, designers work to create spaces, especially work environments, that contribute to good posture for employees confined to offices for most of the day.