GMS6402: Medical Pulmonary Physiology Exam Questions With 100% Correct Answers

GMS6402: Medical Pulmonary Physiology Exam Questions With 100% Correct Answers the vast majority of the total surface area of the lung is found in the... •trachea •segmental bronchi •terminal bronchioles •alveoli - ANSWERS alveoli all of the following can be measured via spirometry EXCEPT... •tidal volume (TV) •vital capacity (VC) •functional residual capacity (FRC) •inspiratory capacity (IC) •expiratory reserve volume (ERV) - ANSWERS functional residual capacity (FRC) which of the following is a muscle that is used for expiration? •sternocleidomastoid •external obliques •diaphragm •external intercostals •scalenus - ANSWERS external obliques what is the transpulmonary pressure (PTP) if pleural pressure is -7 cm H2O and alveolar pressure is -3 cm H2O? •+10 cm H2O •+4 cm H2O •-10 cm H2O •-4 cm H2O •0 cm H2O - ANSWERS +4 cm H2O a lung compliance test indicates that a 3 cm H2O change in transpulmonary pressure generates a 0.9 liter change in lung volume. what is this patient's lung compliance? •0.2 liters of air/cm H2O •0.2 cm H2O/liter of air •3.33 cm H2O/liter of air •0.3 liters of air/cm H2O •2.7 liters of air/cm H2O - ANSWERS 0.3 liters of air/cm H2O airway resistance across a set of airways is lowest under which of the following conditions? •airway radius is large and the length of the tube is large •airway radius is large and the length of the tube is small •airway radius is small and airways are in series. •airway radius is small and airways are in parallel. •airway radius is large and gas viscosity is increased - ANSWERS airway radius is large and the length of the tube is small as the lungs fill with air and we move from a low lung volume to higher lung volumes, airway resistance will... •increase linearly •decrease exponentially •increase exponentially •decrease linearly •all of the above - ANSWERS decrease exponentially a patient performs an expiratory forced vital capacity maneuver. his FVC is 2 liters and his FEV1 is 1 liter. based on your knowledge of these numbers you would predict that this person suffers from... •a restrictive lung disease •pulmonary fibrosis •an obstructive lung disease •all of the above •this patient is normal - ANSWERS an obstructive lung disease when at sea level and breathing room air, the partial pressure of O2 in inspired air is... •760 mm Hg •40 mm Hg •100 mm Hg •160 mm Hg •150 mm Hg - ANSWERS 150 mm Hg a patient begins to hyperventilate while sitting in a clinic on miami beach and breathing room air. over the ensuing 1 minute, his PACO2 drops to 20 mm Hg. what is his PaO2 at that moment in time? •150 mm Hg •125 mm Hg •100 mm Hg •75 mm Hg •50 mm Hg - ANSWERS 125 mm Hg with respect to the path of O2 diffusion, th