GMS 6402 Pulmonary Physiology Exam with Questions and Answers – 100% Solved

GMS 6402 Pulmonary Physiology Exam with Questions and Answers – 100%
Solved

__ are in the ventral horn of the thoracic spinal cord. They are used during quiet breathing
breathing. If only the diaphragm contracted the rib cage muscles would be pulled inward (called
retraction). If the external intercostals contract without the diaphragm contracting then the
diaphragm is pulled upward. - ✔✔✔-External intercostal motor nerves



___ innervate the diaphragm and the cell bodies are in the ventral horn of the thoracic spinal
cord (C3‐C5). They fires in bursts. - ✔✔✔-Phrenic motor nerves



___ is affected by the content variables (Hb concentration and PaO2 /HbO ) as well as cardiac
output - ✔✔✔-Oxygen delivery



___ is made by red blood cells, and production is increased with hypoxia - ✔✔✔-2,3‐
diphosphoglycerate (2, 3‐ DPG) i



___ is still the main source of oxygen in the blood (see total O2 curve). However, the % Hb
saturation is dependent on PaO2. - ✔✔✔-Oxyhemoglobin



___ is where the pressure in the airway equals the pressure in the pleural space. - ✔✔✔-Equal
Pressure Point



Normally, the equal pressure point is in the segmental bronchi.



___ Located in the medulla. Responsible for inspiration. Set the autonomic rhythm of
respiration. Sensitive to H+ in the CSF. Connects to the phrenic nerve which then innervates the
diaphragm to control breathing. - ✔✔✔-Dorsal Respiratory Respiratory Group (DRG)



___ will have the greatest affect on flow and resistance because it's an exponential relationship
- ✔✔✔-Radius

,GMS 6402 Pulmonary Physiology Exam with Questions and Answers – 100%
Solved

____ Also in the medulla. This area mediates expiration under non‐rest conditions. Otherwise,
they are quiet. - ✔✔✔-Ventral Respiratory Group (VRG)



____ is affected by Hb concentration and PaO2/HbO2. - ✔✔✔-Oxygen content



____ is the amount of air inhaled/exhaled with a normal breath from the resting level (~____ L)
- ✔✔✔-Volume (VT)

0.5



____ is the amount of air left in the lungs are a tidal volume breath (~___ L). Therefore, it's ___
+ ___. - ✔✔✔-Functional Residual Capacity (FRC)

2.5

RV + ERV



____ is the amount of air that can be drawn into the lungs after normal expiration (~____ L). -
✔✔✔-Inspiratory capacity (IC)

3



____ is the maximum volume to which the lungs can be expanded(~___ L). Therefore, it's __ +
___ - ✔✔✔-Total lung capacity (TLC)

6

RV + VC



____ is the volume of air that can be expelled after normal tidal volume expiration (~____ L). -
✔✔✔-Expiratory Reserve Volume (ERV)

2

, GMS 6402 Pulmonary Physiology Exam with Questions and Answers – 100%
Solved

_____ is the amount of air that remains after maximal expiration (~____ L). - ✔✔✔-Residual
volume (RV)

1.2



_____ is the amount of air which can be forcibly exhaled from the lungs after taking the deepest
breath possible (~____ L) - ✔✔✔-Forced Vital Capacity (FVC)

5



______ is the volume of air that is exhaled after maximal inspiration (~___ L).Therefore, it's ___
+ ___ + ___ - ✔✔✔-Vital Capacity (VC)

5

ERV+ VT + IRV



_____‐ No cartilage and significantly less smooth muscle. Remember, no gas exchange here. -
✔✔✔-Terminal Bronchioles (Z16)



_____: It is the difference in the inflation and deflation lines on the pressure volume curve. -
✔✔✔-Hysteresis



It exists because a greater pressure is required to open a previously closed airway than to keep
an open airway from closing



= (Tidal Vol - Dead Space) x Resp Rate

= (0 - 150) x 0

= 0 mls per minute - ✔✔✔-when apenic



Airway resistance will ____ as we move towards lower lung volumes. - ✔✔✔-increase