Work of breathing When there is increased gas flow resistance, the optimal respiratory rate decreases. This work (generally during the inhalation phase) is stored as potential energy which is recovered during exhalation. A pressure difference is required to overcome the frictional resistance to gas flow due to viscosity, and to provide non-elastic components of movement of the airway tissues to accommodate pulmonary volume change. Total work done against non elastic forces is 35% of total. Work is defined as a force applied over a distance. The SI unit of work is the Joule, equivalent to a force of 1 Newton exerted along a
Work unit Work unit A unit or danwei () is the name given to a place of employment in the People's Republic of China. While the term "danwei" remains in use today it is more properly used to refer to a place of employment during the period when the Chinese economy was not as developed and more heavily reliant on welfare for access to long-term urban workers or when used in the context of one of state-owned enterprises. Prior to Deng Xiaoping's economic reforms, a work unit acted as the first step of a multi-tiered hierarchy linking each individual with the central