Physioex 8.0 Respiratory Lab Essay - 696 Words

Respiratory System Mechanics Simulation Lab Activity 1: MRV __7500__ ml/min =500 tv x 15bmp Does expiratory reserve volume include tidal volume? Explain. Expiratory reserve volume (ERV) does not include tidal volume. Expiratory reserve volume is the amount of air that can be expelled after a normal tidal exhalation. This means that tidal volume is not included in the ERV measurement. Activity 2: FEV1, as % of VC Radius FEV1 Vital Capacity FEV1% 5.00 3541 4791 73.90 4.50 2303 3143 73.27 4.00 1422 1962 72.47 3.50 822 1150 71.47 3.00 436 621 70.20 What happened to FEV1 (%) as the radius of the airways was decreased? Explain. FEV 1 (%) will decrease as the airway radius is decreased. FEV 1 (%) is†¦show more content†¦The total airflow was reduced by one half. What do you think would happen if the two lungs were in a single large cavity instead of separate cavities? Both lungs would collapse when the thoracic wall was punctured if the two lungs were in a single cavity instead of individual cavities. Did the deflated lung reinflate? Explain. The lungs did not reinflate when the valve was closed. In addition to closing off the opening to the atmosphere, the excess air in the intrapleural space must be removed to decrease intrapleural pressure below atmospheric pressure before the lungs will reinflate. Why did lung function in the deflated (left) lung return to normal after you clicked Reset? After clicking Reset and running the experiment again, the function of the simulated lungs returned to normal. This happened because the air was removed from the intrapleural space, allowing the lungs to reinflate. Intrapleural pressure was decreased below atmospheric pressure by clicking Reset. Activity 5: What happens to PCO2 during hyperventilation? Explain. PCO2 decreased during rapid breathing because more CO2 was removed from the blood than normal. Each breath expels a certain amount of CO2. If the breathing rate increases, then more CO2 is expelled. What happens to PCO2 during the entire time of the rebreathing activity? PCO2 increases during rebreathing because the CO2 gradient is being