The respiratory system

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  • Created by: Joy
  • Created on: 29-01-13 10:50
What is the main purpose of the respiratory system?
To overcome the limitation of distance in the properties of diffusion
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What is the function of the pleural sac?
It reduces friction from movement on the surface of the lungs and fixes the lungs firmly on the thoracic wall without any physical attachments
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Roughly how many divisions does the bronchial tree undergo from the trachea to the alveolar sacs?
23
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What is the significance of the bronchial tree undergoing numerous divisions
It increases the surface area for which gaseous exchange can take place
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What are reserve volumes?
The amount of additional air that can be moved in and out of the lungs with heavier breathing
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Minute ventilation is given by which relationship?
(Tidal volume) x (breaths per minute)
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When volumes are measured under the scheme of Ambient Temperature and Pressure, Saturated (ATPS), What has to be considered with temperature?
Ambient temperature of location of measurements
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When volumes are measured under the scheme of Body Temperature and Pressure, Saturated (BTPS), What has to be considered with temperature?
Body temperature (normally 37 degrees c)
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When volumes are measured under the scheme of Standard Temperature and Pressure, Dry (STPD), What has to be considered with temperature?
273 degrees Kelvin
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When volumes are measured under the scheme of Ambient Temperature and Pressure, Saturated (ATPS), What has to be considered with Pressure
Ambient atmospheric pressure
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When volumes are measured under the scheme of Body Temperature and Pressure, Saturated (BTPS), What has to be considered with Pressure
Ambient atmospheric pressure
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When volumes are measured under the scheme of Standard Temperature and Pressure, Dry (STPD), What has to be considered with Pressure
Atmospheric presure at sea level
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When volumes are measured under the scheme of Ambient Temperature and Pressure, Saturated (ATPS), What has to be considered with Water Vapour
PH2O at ambient temperautre
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When volumes are measured under the scheme of Body Temperature and Pressure, Saturated (BTPS), What has to be considered with Water Vapour
PH2O at body temperature
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When volumes are measured under the scheme of Standard Temperature and Pressure, Dry (STPD), What has to be considered with Water Vapour
Water vapour is not taken into account
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What is the approximate partial pressure of O2 in Inspired Air?
159mmHg
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What is the approximate partial pressure of CO2 in Inspired Air?
0.3mmHg
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What is the approximate partial pressure of O2 in the alveoli?
100mmHg
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What is the approximate partial pressure of CO2 in the alveoli?
40mmHg
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What is the approximate partial pressure of O2 in the Artetries?
100mmHg
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What is the approximate partial pressure of CO2 in the Artetries?
40mmHg
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What is the approximate partial pressure of O2 in the Veins?
40mmHg
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What is the approximate partial pressure of CO2 in the Veins?
46mmHg
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What is the approximate partial pressure of CO2 in mixed expired air?
27mmHg
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What is the approximate partial pressure of O2 in mixed expired air?
120mmHg
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What is the significance of Haemoglobin binding to H+ ions?
It is a buffering action that prevents acidosis
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Other cards in this set

Card 2

Front

What is the function of the pleural sac?

Back

It reduces friction from movement on the surface of the lungs and fixes the lungs firmly on the thoracic wall without any physical attachments

Card 3

Front

Roughly how many divisions does the bronchial tree undergo from the trachea to the alveolar sacs?

Back

Preview of the front of card 3

Card 4

Front

What is the significance of the bronchial tree undergoing numerous divisions

Back

Preview of the front of card 4

Card 5

Front

What are reserve volumes?

Back

Preview of the front of card 5
View more cards

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