Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Respiratory system > Pulmonary Flow > Flashcards

Pulmonary Flow Flashcards

1
Q

What is the difference between bronchial circulation and pulmonary circulation?

A

Bronchial circulation delivers oxygen and takes CO2 from lung tissues, pulmonary circulation takes blood to the lungs for gas exchange

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What type of blood does the pulmonary artery carry?

A

Deoxygenated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What type of blood does the pulmonary vein carry?

A

Oxygenated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What type of blood as the same gas composition as the alveoli?

A

Arterial

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What type of blood has the same composition as the body’s cells?

A

Veinous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why is the partial pressure gradient of O2 so close to the partial pressure gradient of CO2 in the alveoli despite the massive difference in partial pressures?

A

CO2 is much more soluble in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What cells in the alveoli are capillaries always adjacent to?

A

Type I pneumocytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Why is gas exchange decreased in a pulmonary oedema?

A

The fluid pushes the alveoli away from the capillaries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where is pulmonary blood flow greatest?

A

At the base of the lung, due to gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

At which level are blood flow and ventilation equal?

A

Rib 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why does smoking cause emphysema?

A

The chemicals activate elastin which destroys the elastase in the lungs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When talking about partial pressures,what do A, a, and

ṽ mean?

A

A - Alveolar
a -Arterial blood
ṽ - Mixed venous blood1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is directly proportional to the rate of gas diffusion?

A

The partial pressure gradient
The gas solubility
The available surface area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is inversely proportional to the rate of gas

diffusion?

A

The thickness of the membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the partial pressure gradients in the alveoli?

A

O2 - 100mmHg-40mmHg (13.3kPa-5.3kPa)

CO2 - 46mmHg-40mmHg(6.1kPa-5.3kPa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the gas exchange rates of O2 and CO2 in the alveoli?

A

O2 - 250mls/min

CO2 - 200mls/min

17
Q

What is shunt?

A

Blood flowing from the right side to the left side of the heart without being supplied with oxygen or having its CO2 removed

18
Q

What is the ideal ratio of perfusion/ventilation?

A

1:1

19
Q

What is alveolar dead space?

A

Alveoli with air that can’t be used for gas exchange

20
Q

What is physiological dead space?

A

The sum total of alveolar dead space and anatomical dead space

21
Q

Where does the majority of mismatch of perfusion/ventilation happen?

A

Apex of the lung

Respiratory system (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions