Brainscape's Knowledge GenomeTM

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


See full index

2.1 Control and Integrative Physiology > Natalie - Pulmonary Pressures > Flashcards

Natalie - Pulmonary Pressures Flashcards

1
Q

Define pulmonary ventilation

A

The physical movement of air into and out of the lungs

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

What two things does the movement of air depend on?

A

Boyle’s Law
Compliance

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

What is Boyle’s Law

A

The pressure and volume of a gas are inversely proportional at constant temperature and volume

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

Define lung compliance
(2)

A

A measure of the ease at which our lungs can stretch

An indication of the expandability of the lungs

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

Describe the movement of air in relation to pressure

A

Air moves from high to low pressure

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

What pressures determine the direction of air flow in the lungs?

A

The relationship between the intra-pulmonary pressure and the atmospheric pressure determines the direction of air flow

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

What pressures determine the direction of air flow in the lungs?

A

The relationship between the intra-pulmonary pressure and the atmospheric pressure determines the direction of air flow

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

What is the intra-pulmonary pressure

A

Pressure inside the alveoli

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

What is the intra-pulmonary pressure

A

Pressure inside the alveoli

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

What is intra pleural pressure?

A

Pressure in the pleural cavity

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

What does intra-pleural pressure control?

A

It maintains pull on the lungs

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

List the three different types of pressures

A

Intra-alveolar/pulmonary pressure (pressure in the alveoli)

Atmospheric pressure

Intra-pleural pressure

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

What happens to the volume of the thorax during inhalation?

A

The volume increases during inhalation

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

What happens to the pressure in the lungs during inhalation and why?

A

Pressure decreases because the volume of the thorax increases (lungs expand and fill with air but have more room therefore less pressure)

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

What happens to the pressure in the lungs during exhalation

A

Volume of thorax decreases - air forced out of lungs so pressure increases

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

What pressure is responsible for keeping the lungs open?

A

Intra-pleural pressure

17
Q

List the three pulmonary pressures

A

Intra alveolar pressure

Intra pleural pressure

Trans pulmonary pressure

18
Q

Define tidal volume

A

The volume of air taken into the lungs at rest
Approximately 500 mls

19
Q

Write a note on intra pleural pressure
(4)

A

It is always negative, never positive

If it goes above zero the lung collapses

Pressure must be lower than atmospheric pressure

Lower than alveolar pressure - allows alveoli to stay open - keeps about 1L of air in the lungs which never leaves

20
Q

What are the two phases to breathing

A

Inhalation
Exhalation

21
Q

What is inhalation?

A

Air is pulled into the lungs

22
Q

What is exhalation?

A

Air is pushed out of the lungs

23
Q

What is the overall function of breathing?

A

To deliver oxygen to the alveoli

To remove carbon dioxide

24
Q

Define breathing

A

The continuous cycle of inhalation and exhalation

25
Q

What is respiratory rate?

A

Amount of breaths per minute
Average = 10 to 15

26
Q

What happens when the diaphragm contracts?

A

The diaphragm moves down - pulls lungs down - pulls air into lungs - inhalation

27
Q

What happens when the diaphragm relaxes?

A

The diaphragm moves up - pushes lungs up - pushes air out of lungs - exhalation

28
Q

State Boyle’s Law

A

For a given quantity of any gas (such as air) in a container, the
pressure is inversely related to the volume of the container

29
Q

What happens to intra-pleural pressure as we inhale?

A

It gets more negative as we inhale as pleural fluid doesn’t expand (so its pressure drops)

30
Q

What are two other names for intra-alveolar pressure?

A

Intra pulmonary pressure

Intra thoracic pressure

31
Q

What two factors determine intra alveolar pressure?

A

Amount of air in the alveoli

The volume of the alveoli themselves

32
Q

What is the loss of alveoli called?

A

Atelectasis

33
Q

Why is pressure exerted outwards in the lung?

A

Pressure in the alveoli is higher than the intra pleural pressure

34
Q

What happens to intra alveolar pressure during inhalation?

A

It decreases slightly but does NOT go below intra pleural pressure

35
Q

What is trans pulmonary pressure?

A

The difference between the intra alveolar and intra pleural pressure

36
Q

What happens to the trans pulmonary pressure during inhalation?

A

It increases during inhalation

37
Q

What is a pneumothorax
(3)

A

Pneumothorax occurs when air leaks from inside of the lung to
the space between the lung and the chest wall.

The lung then collapses

It is the presence of air within the pleural space

38
Q

What happens to pulmonary pressures during a pneumothorax?

A

Pressure is exerted INWARDS
Alveolar pressure lowers below intra pleural pressure (which increases)

2.1 Control and Integrative Physiology (21 decks)

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