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Physiology II Lab Exam Review A descriptive review of information presented in the all of the lab's practiced in this class. In preparation for the Lab Exam.

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Kinesiology & Health Science
KINE 3012
Tara Haas

Physiology Lab Exam Review Pulmonary functionSpirometry refers to the measurement of lung volumes and lung capacities This helps determine pulmonary function or disease Total lung capacityTLC the amount of air in lungs after a maximum inhalation TLCVCRVVital capacity VCis the maximum amount of air that can be exhaled after a maximum inhalation VCIRVERVVtInspiratory capacity ICis the maximum amount of air that can be inhaled after a normal unforced exhalation ICVtIRVExpiratory capacity ECis the maximum amount of air that can be exhaled after a normal inhalation ECVt ERVTidal volume Vtis the volume of air inspired or expired during each normal ventilation cycleInspiratory reserve volume IRVis the maximum amount of air that can be forcefully inhaled after a normal inhalationExpiratory reserve volume ERVis the maximum amount of air that can be forcefully exhaled after a normal exhalationFunctional Residual capacity FRCthe amount of air left in the lungs after a normal exhalation FRCERVRVResidual volume RVthe amount of air left in the lungs after a maximum exhalation RVVC025The movement of air into and out of the lungs is driven by a pressure gradient between the lungs and the atmosphere This pressure gradient is caused by changes in the volume of the thoracic cavity According to Boyles law the pressure of gas is inversely proportional to its volumeIn normal unforced breathing eupnoea or eupneic breathing the thoracic volume is regulated by the action of the diaphragm and the intercostals muscles Breathing can be difficult is the air passages are obstructed or if the lungs lose their normal elasticity This occurs in obstructive and restrictive pulmonary diseases resulting in a condition of laboured breathing called dyspnoea Obstructive disorders are when there is a small reduction in the radius of the pulmonary airway which results in greatly magnified resistance to airflowThis can result in inflammation oedema smooth muscle constriction and bronchiolar secretion One of the most common obstructive disorders is emphysema which is characterized by the destruction of alveoli in the lungs
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