Ch 29 and 30 - Transport of CO2 and O2 in the blood & Gas exchange in the lungs (2019) Evals by Keim Flashcards
Which of the ff does not describe the normal structure of adult Hemoglobin?
Metal ion in ferric state
Residue binds to ferrous and will stabilize the complex
Histidine
All heme devoid of oxygen each of the residue will pull the Fe2+ from above the plane by:
0;06 nm
Which of the following factors will shift the Hb-O2 dissociation curve to the left?
Decrease PCO2
CO2 increase, O2 decrease.
Haldane effect
True or False: Gas exchange more efficient at apex than base.
True
Increase diffusing capacity.
Exercise
Interstitial space with ECM:
D6
What happens at the end of the inspiration?
Lung surface maximizes the end of inspiration
Most amount of oxygen in the blood
Combined with hemoglobin in RBCs
Cl-HCO3 exchanger other names except:
Bicarbonate shift
Gas parameters except:
No exception
The blood carries total CO2 mainly as:
Bicarbonate
Venous PCO2
45 mmHg
Partial pressure of O2 in alveolar is normally lower because:
Oxygen requires a pressure gradient diffuse
Pulmonary concentration depends except:
Hemoglobin concentration
Number of oxygen molecules moving across the barrier
Flow
Diffusion limited:
CO2
Why CO does not reach equilibrium?
Hemoglobin that enters pulmonary capillary is already heavily preloaded.
The incremental CO2 passes through the following gas channels except:
Aquaporin II
Which is true?
Net flow is proportional to the area and INVERSELY PROPORTIONAL to thickness
Which form of CO2 follows Henry’s law?
Dissolved CO2
Heme is oxidized.
Nonplanar to planar
Increase airway resistance:
COPD
Net flow is proportional to the concentration gradient.
Fick’s law
Exchange of gases in the alveoli:
Simple diffusion
What other gases bind to the ferric state of hemoglobin aside from oxygen and snap it into the relax state?
All of the above
11% of incremental CO2 travels in the ff. except:
Carbonate
PCO2 rises slowly because:
CO flux is low
Very high partial pressure of oxygen except:
T state
