22. The Respiratory System

Law of Partial Pressure

객관식
For air at 25 °C (77 °F) with 100% humidity, what is the partial pressure of oxygen (PO2) in mmHg?
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객관식
In a healthy adult at sea level, the partial pressure of oxygen ( $P_{O}$ ) in systemic arterial blood is approximately which of the following?
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객관식
Henry's law states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture.
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객관식
Air in the alveoli is approximately 5.2% CO₂. Given that information along with the total air pressure in the alveoli, which law would allow you to calculate the partial pressure of CO₂?
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객관식
Which of the following is NOT involved in respiration?
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객관식
Henry's law states that when a gas is in contact with a liquid, that gas will dissolve in the liquid in proportion to its partial pressure.
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객관식
How is Henry’s law related to the amount of gas that can be exchanged in the alveoli?
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객관식
The movement of air into and out of the lungs is called __________.
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객관식
Gas A and Gas B are both mixtures separated by a permeable membrane. Gas A contains 40% nitrogen at a partial pressure of 300 mm Hg. Gas B contains 80% nitrogen at partial pressure of 200 mm Hg. Given this information, in which direction do you expect to see a net movement of nitrogen and why?
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객관식
Gas A is 40% oxygen and 10% CO₂. It has a total pressure of 500 mm Hg. Gas A is in contact with a with a liquid containing oxygen at a partial pressure of 100 mmHg and CO₂ at a partial pressure of 25 mm Hg. In which direction will O₂ and CO₂ diffuse in this situation?

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