Explain why the gas values from the alveolar air to the blood change during pulmonary gas exchange. For example: Alveolar air for CO2 has a value of 40mmHg then when entering the blood shifts to 45mmHg
Explain why the gas values from the alveolar air to the blood change during pulmonary gas exchange. For example: Alveolar air for CO2 has a value of 40mmHg then when entering the blood shifts to 45mmHg
Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter13: The Respiratory System
Section: Chapter Questions
Problem 1SQE
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Question
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Explain why the gas values from the alveolar air to the blood change during pulmonary gas exchange.
For example:
Alveolar air for CO2 has a value of 40mmHg then when entering the blood shifts to 45mmHg. Why does this occur?
I tried to calculate this by using Dalton’s law but I’m not
Understanding.
Transcribed Image Text:en by pressure gradients within the lungs the gases partial pressure values fluctuate.
the formula PN,+PO,+PCO,+PH,O+Pother=Total, applies to calculating the total pressure of gas within the I
air is 597+159+0.3+3.0+0.5=760mmHg
percent of gas in the alveoli, in order to calculate the partial pressure we use the following formula; 0.137x760
en in the alveolar air. While carbon dioxide makes up 0.3 percent of gas in the alveoli and has a total pressure
auses the gases to flow rapidly across the alveolar membrane into the blood stability is quickly achieved. Due t
s much lower than the volume of total gaseous air in the alveoli the composition of gases within the blood dec
in similar values as illustrated below.
COMPOSITION OF GAS EXCHANGE
102 1CO2
ALVEOLAR AIR
BLOOD ENTERING
AFTER GAS
N ANATOMY & PHYSIOLOGY. NEW YORK: PEARSON.
LUNGS
EXCHANGE
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