Gas Exchange

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  • Created by: ntygs19
  • Created on: 11-03-20 19:38
Gas exchange occurs through which 2 processes?
1. Diffusion and 2. Partial Pressure.
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What is Diffusion?
The movement of gases from an area of high pressure to an area of low pressure, down a concentration gradient.
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What is Partial Pressure?
The pressure of a specific gas in a mixture like air. In a mixture of gases such as air, each gas behaves as if it were the only one present. The individual gas' pressure is known as partial pressure. Will move down it's own concentration gradient.
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What is partial pressures the driving force of?
Driving force causing gases to move across membranes
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Where are partial pressures important? Internal or external respiration?
Both. In both forms of respiration, CO2 and O2 move from areas of high partial pressure to areas of low partial pressure.
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What is the term of internal gas exchange? S_ Gas Exchange
SYSTEMIC
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Systemic gas exchange is the exchange of gases between S_ B_ C_ and S_ T_ C_... from what to what?
Systemic gas exchange is the exchange of gases between SYSTEMIC BLOOD CAPILLARIES and SYSTEMIC TISSUE CELLS .... From blood to tissue.
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PULMONARY (External) GAS EXCHANGE... is the exchange of gases between ? and ?
exchange of gases between alveolar air and pulmonary blood capillaries... from lungs to blood.
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Through pulmonary gas exchange, Nitrogen, Oxygen and CO2 diffuse between the A_ S_ and P_ B_ C_.
Through pulmonary gas exchange, Nitrogen, Oxygen and CO2 diffuse between the Alveolar Sac and Pulmonary Blood Capillary
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Oxygen accounts for 21% of air, but only _% of gas levels in blood. So it diffuses down it's concentration gradient from where to where?
Oxygen accounts for 21% of air, but only 14% of gas levels in blood. So it diffuses down the concentration gradient from the alveolar sac to pulmonary blood capillary
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Why are oxygen levels in blood less than that of alveolar air?
Because cells use oxygen for energy.
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CO2 accounts for 0.04% of alveolar air, and _% of blood gas levels, so it moves down it's concentration gradient from where to where?
CO2 accounts for 0.04% of alveolar air, and 5% of blood gas levels, so it moves down it's concentration gradient from pulmonary blood capillaries into the alveolar sac for exhalation
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Why are CO2 Blood gas levels higher than that of air?
Because it is a waste product of energy.
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Why do nitrogen levels in air and blood barely differ?
Because it is an innert gas - not used in respiration.
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What percentage of blood oxygen dissolves into the blood?
1.5%
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How is the other 98.5% transported in the body?
Binds to Haemoglobin (red blood cells)
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What part of Haemoglobin does oxygen bind to?
The HAEM group (the red pigment)
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How is 23% of CO2 transported in the body?
Binds to Haemoglobin
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What part of Haemoglobin does CO2 bind to?
The GLOBIN group (Globular protein)
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How much CO2 dissolves into blood?
7%
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70% of CO2 is locked away to store in what?
Bicarbonate Ions
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Other cards in this set

Card 2

Front

What is Diffusion?

Back

The movement of gases from an area of high pressure to an area of low pressure, down a concentration gradient.

Card 3

Front

What is Partial Pressure?

Back

Preview of the front of card 3

Card 4

Front

What is partial pressures the driving force of?

Back

Preview of the front of card 4

Card 5

Front

Where are partial pressures important? Internal or external respiration?

Back

Preview of the front of card 5
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