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Flashcards in Transport of Gases Deck (14)
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1
Q

Partial pressure of oxygen in alveoli artery and veins?

A

Alveoli: 100
Artery: 95
Vein: 40

2
Q

Partial pressure of carbon dioxide in alveoli artery and veins?

A

Alveoli: 40
Artery: 40
Vein: 46

3
Q

What occurs to partial pressure of O2 in the lungs in hyper and hypoventilation respectively?

A

Hyperventilation: increase
Hypoventilation: decrease

4
Q

How many layers do gases have to diffuse to in order to reach the Hb?

A

12 layers affecting diffusion constants

5
Q

What is important to note about the Fick law?

A

Each can be affected by a diseased condition

6
Q

Difference in diffusion limited and perfusion limited?

A

Diffusion limited: abnormal condition in which the gases have to diffuse through a thicker wall (fibrosis; can’t diffuse)
Perfusion limited: dependent on blood flow (more oxygen in capillary only if increased blood flow; gas reaches saturation point in the blood)

7
Q

How can exercise be diffusion limited?

A

There is more blood flowing than oxygen being ventilated to saturate the blood

8
Q

Formula pulse oximeter uses?

A

SaO2= (HbO2 content/HbO2 capacity)x100%

9
Q

What do pulse oximeters tell you?

A

Just concentration of O2 in blood nothing else do not extrapolate knowledge (just don’t)

10
Q

What is the concentration of 2,3-BPG in pregnant women versus normal?

A

Higher 2,3-BPG

11
Q

What Hb can give you an idea of diabetic management indicator?

A

HbA1c when it is highly glycosylated

12
Q

What amount of CO2 is dropped off from systemic to lungs?

A

Systemic 52 mL/dL- pulmonary 48 mL/dL= 4 mL/dL

13
Q

What is the major way that CO2 is transported in blood?

A

HCO3-

14
Q

What is the Haldane effect?

A

Higher oxygen content decreases the affinity of CO2 for Hb