PHYS 1302 Lecture Notes - Lecture 3: Glycolysis, Bradykinin Receptor B2, Muscarinic Acetylcholine Receptor
Ch. 17: Mechanics of Breathing
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Document Summary
Exchange of gases between atmosphere and blood. Protection from inhaled pathogens and irritating substances. Cellular respiration: intracellular reaction of o2 with organic molecules to produce co2, water, and energy in the form of atp. External respiration: movement of gases between the environment and the body"s cells. Exchange of air between atmosphere and lungs (ventilation) Exchange of o2 and co2 between lungs and the blood. Transport of o2 and co2 by the blood. Exchange of gases between the blood and cells. Conducting system of passages (airways) that lead from external environment to exchange surface of lungs. Bones and muscles of thorax to assist in ventilation. Trachea, 2 primary bronchi, their branches, lungs. Bones and muscles of the thorax surround the lungs. Diaphragm forms the floor of the thoracic cage. Thorax is filled with one pericardial sac and two pleural sacs. Air must be conditioned before reaching alveoli. Adding water vapor until air reaches 100% humidity.
