To explain: Epinephrine administrated for the treatment of asthma increases or decreases airway resistance.
Concept introduction: The respiratory system is the biological system that consists of specific organs and structures used for the gas exchange in animals. Gas exchange is the transport of respiratory gases between blood and either alveoli or cells of systemic tissues. During breathing, gases in air move down collectively of its pressure gradient, whereas during gas exchange each gas moves down independently following its own partial pressure.
To explain: The reason why or why not all of the air taken in during pulmonary ventilation available for gas exchange.
Concept introduction: The respiratory system is the biological system that consists of specific organs and structures used for the gas exchange in animals. Gas exchange is the transport of respiratory gases between blood and either alveoli or cells of systemic tissues. During breathing, gases in air move down collectively of its pressure gradient, whereas during gas exchange each gas moves down independently following its own partial pressure.
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