Ch 29 and 30 - Transport of CO2 and O2 in the blood & Gas exchange in the lungs (2019) Evals by Keim Flashcards Preview

PHYSIOLOGY - 1st Year 1st Sem Comprehensive Exam > Ch 29 and 30 - Transport of CO2 and O2 in the blood & Gas exchange in the lungs (2019) Evals by Keim > Flashcards

Flashcards in Ch 29 and 30 - Transport of CO2 and O2 in the blood & Gas exchange in the lungs (2019) Evals by Keim Deck (30)
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1
Q

Which of the ff does not describe the normal structure of adult Hemoglobin?

A

Metal ion in ferric state

2
Q

Residue binds to ferrous and will stabilize the complex

A

Histidine

3
Q

All heme devoid of oxygen each of the residue will pull the Fe2+ from above the plane by:

A

0;06 nm

4
Q

Which of the following factors will shift the Hb-O2 dissociation curve to the left?

A

Decrease PCO2

5
Q

CO2 increase, O2 decrease.

A

Haldane effect

6
Q

True or False: Gas exchange more efficient at apex than base.

A

True

7
Q

Increase diffusing capacity.

A

Exercise

8
Q

Interstitial space with ECM:

A

D6

9
Q

What happens at the end of the inspiration?

A

Lung surface maximizes the end of inspiration

10
Q

Most amount of oxygen in the blood

A

Combined with hemoglobin in RBCs

11
Q

Cl-HCO3 exchanger other names except:

A

Bicarbonate shift

12
Q

Gas parameters except:

A

No exception

13
Q

The blood carries total CO2 mainly as:

A

Bicarbonate

14
Q

Venous PCO2

A

45 mmHg

15
Q

Partial pressure of O2 in alveolar is normally lower because:

A

Oxygen requires a pressure gradient diffuse

16
Q

Pulmonary concentration depends except:

A

Hemoglobin concentration

17
Q

Number of oxygen molecules moving across the barrier

A

Flow

18
Q

Diffusion limited:

A

CO2

19
Q

Why CO does not reach equilibrium?

A

Hemoglobin that enters pulmonary capillary is already heavily preloaded.

20
Q

The incremental CO2 passes through the following gas channels except:

A

Aquaporin II

21
Q

Which is true?

A

Net flow is proportional to the area and INVERSELY PROPORTIONAL to thickness

22
Q

Which form of CO2 follows Henry’s law?

A

Dissolved CO2

23
Q

Heme is oxidized.

A

Nonplanar to planar

24
Q

Increase airway resistance:

A

COPD

25
Q

Net flow is proportional to the concentration gradient.

A

Fick’s law

26
Q

Exchange of gases in the alveoli:

A

Simple diffusion

27
Q

What other gases bind to the ferric state of hemoglobin aside from oxygen and snap it into the relax state?

A

All of the above

28
Q

11% of incremental CO2 travels in the ff. except:

A

Carbonate

29
Q

PCO2 rises slowly because:

A

CO flux is low

30
Q

Very high partial pressure of oxygen except:

A

T state