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Flashcards in breathing Deck (253)
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1

boyle's law

states that the pressure exerted by a gas is inversely proportional to to its volume (P a 1/V).
Note that gases (singly or in mixtures) move from areas of high pressure to areas of low pressure.

2

Dalton's law

states that the total pressure of a gas mixture is the sum of the pressures of the individual gases.

3

Charles law

states that the volume occupied by a gas is directly related to the absolute temperature (v a T)

4

henry's law

states that the amount of gas dissolved in a liquid is determined by the pressure of the gas and it’s solubility in the liquid.

5

expiratory reserve volume

1100 mL

6

what is the vital capacity volume

4600 mL

7

inspiratory reserve volume

3000 mL

8

dead space volume

150 mL

9

what is the alveolar ventilation pressure for o2

13.3 kPa - 100mm hg

10

what is the alveolar ventilation pressure for Co2

5.3 kPa - 40 mm hg

11

during inspiration diaphragm does

contract and the volume increases

12

during expiration the diaphragm does

relax and the volume decreases

13

intra thoracic alveolar pressure is

negative or positive in comparison to atmospheric pressure

14

intra pleural pressure

always negative

15

trans pulmonary pressure

always positive

16

the pulmonary circulation is an example of what system?

high flow, low pressure system

17

tissue values partial pressure of oxygen and carbon dioxide

02 - 40 mmHg (5.3kPa)
C02- 46 mmHg (6.2kPa)

18

factors that affect gas exchange are

partial pressure gradient
gas solubility
surface area
thickness of membrane

19

what is the perfect ventilation: perfusion ratio

1

20

alveolar dead space causes

pulmonary vasodilation in response in increase oygen and bronchial constriction in response to alveolar decreases carbon dioxide levels

21

anatomical dead space refers to

air in the conducting zone of the respiratory tract

22

Type 2 alveolar cells produce what which does what?

surfactant
increases lung compliance
reduces recoil
makes breathing easier
effective in small alveoli
relaxes water tension

23

equation of LaPlace

P=2T/r

24

high compliance refers to

large increase in lung volume in response to a small decrease in ip pressure

25

compliance represents

stretch ability

26

examples of obstructive lung disorders

asthma
COPD (bronchitis or emphysema (loss of elasticity) - very low FEV1, slightly low FVC (low ratio)

27

examples of restrictive lung disorders

fibrosis
infant respiratory distress syndrome (no surfactant)
oedema
Pneumothorax
normal or elevated FEV1/FVC ratio, but severely decreased lung capacity. use FEF.

28

what is the test for breathing?

spirometry

29

haemoglobin increases oxygen carrying in RBC to how much?

200ml

30

02 solubility in water is

0.03ml/L/mmHg