test 2 Flashcards Preview

Physiology Test 2 > test 2 > Flashcards

Flashcards in test 2 Deck (151)
Loading flashcards...
1

What is increased with emphysema?

duration of forced vital capacity and forced expiratory volumes.

2

What is another word for breathing hunger?

dyspnea

3

Over-inflation of the lungs is called what?

Barrel chest.

4

heavy breathing is done by what?

rib cage based.

5

Restful breathing is done by what?

diaphragmatic based.

6

Why do we need to change the shape of the chest to breath?

It changes the pressure on the lungs.

7

What type of pressure is on the pleural cavity?

Negative pressure.

8

What causes negative pressure in the pleural cavity?

Low blood pressure in pulmonary circulation and tension created by elastic recoil.

9

What will surfactin do?

Helps prevent the collapsing tendency of alveoli due to the presence of water on walls. It lessens the H2O effect.

10

What is an accumulation of air or gas in the pleural cavity as a result of disease or injury called?

Pneumothorax.

11

What is atelectasis?

a collapse of an area or a lobe that leaves a shrunked or airless state.

12

What is the primary cause of atelectasis?

luminal obstruction.

13

What is a serious condition where-in the respiratory membranes fail?

Respiratory distress syndrome.

14

What is the most common type of respiratory distress syndrome? What causes it?

Infant form. Due to the lack of surfactin.

15

Respiration all comes down to what?

changes in transmural pressure.

16

What is transmural pressure?

Pressure difference between intrapleural and intrapulmonic.

17

Changing volume due to changing pressure is called what?

Compliance.

18

What are the 3 types of work needed to be done with inhalation?

1. compliance work. 2. tissue resistance work. 3. Airway work.

19

Work = what?

work= force x distance.

20

What is force and what is distance?

force= pressure, distance = volume.

21

With complance work all engery is converted to what?

Air movement.

22

What is tissue resistance work?

The work needed (or lost) to move tissues around.

23

What is airway work?

It is the work needed (or lost) to overcome drag on all respiratory tree linings.

24

Just like r^4 was important for blood flow what is R in the respiratory system?

R= air way drag.

25

What is the prime determinate of airway work?

R^4.

26

When will tissue work become a factor in breathing?

very low with diaphragmatic, but high with ribcaged- breathing.

27

Where will the work go when we inhale?

It goes into the elasticity of the lungs.

28

What work is used for exhalation?

We use the stored work from inhalation.

29

What work is needed to exhale?

Some tissue and airway work.

30

What is free work of expiration?

All besides deducting some for tissue and airway work.