BIOC34H3 Chapter Notes -Exhalation, Pneumothorax, Adipose Tissue

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9 Mar 2013
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The goal of this lab was to stimulate spirometry and measuring the tidal volume, inspiratory reserve volume, expiratory reserve volume, vital capacity, residual volume and lung capacity, using a pair of mechanical lungs. Furthermore, computer simulations were carried out to see the affects of various factors such as lung compliance, presence of surfactant and the presence or absence of injury in the thoracic walls that affect respiration. Surfactant is a lipid material secreted into the alveolar fluid, is another. Surfactant acts to decrease the surface tension of water in the fluid that lines the walls of the alveoli. Furthermore, presence of an injury in the thoracic walls would effectively raise the intrathoracic pressure to that of atmospheric pressure, preventing diaphragm contraction from decreasing intrathoracic pressure and, consequently, preventing air from being drawn into the lungs. A trial run was carried out to measure the respiratory volumes through computer simulations prior to the start of the experiments.

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