Open Question
You and a friend are having a contest to see who can hold his or her breath the longest. Your friend hyperventilates before holding his breath, and subsequently wins the contest. Why did hyperventilation give him an advantage?
22. The Respiratory System
Law of Partial Pressure
Back22. The Respiratory System
Law of Partial Pressure
- Multiple Choice
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?
- Open QuestionWhich of the following determines the direction of gas movement?a. solubility in water,b. partial pressure gradient,c. temperature,d. molecular weight and size of the gas molecule.
- Multiple ChoiceThe movement of air into and out of the lungs is called __________.
- Open Question
Henry's law states that the degree to which a gas dissolves in a liquid is determined by its:
a. partial pressure.
b. solubility.
c. surface tension.
d. Both a and b are correct.
e. All of the above are correct.
- Open QuestionWhat three integrated steps are involved in external respiration?
- Multiple ChoiceHenry'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.
- Multiple ChoiceHenry'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.
- Open QuestionWhat is the significance of (c) Henry's law to the process of respiration?
- Open QuestionWhat is the significance of (b) Dalton's law, to the process of respiration?
- Open Question
Fill in the blanks: When the alveolar Po₂ decreases, the pulmonary arterioles_____. When the arteriolar Pco₂ increases, the bronchioles_______.
- Open QuestionWhich of the following does not occur in internal respiration? (a) Oxygen diffuses from the blood to the interstitial spaces. (b) Carbon dioxide diffuses from the interstitial spaces to the blood. (c) Hemoglobin binds more oxygen. (d) Bicarbonate ions are formed in red blood cells. (e) Chloride ions diffuse into red blood cells as bicarbonate ions diffuse out.
- Open QuestionGas exchange at the blood air barrier is efficient because (a) the differences in partial pressure are substantial, (b) the gases are lipid soluble, (c) the total surface area is large, (d) of all of these.
- Open QuestionOxygen and carbon dioxide are exchanged in the lungs and through all cell membranes bya. active transport,b. diffusion,c. filtration,d. osmosis.
- Open QuestionDoris has an obstruction of her right primary bronchus. As a result, how would the oxygen–hemoglobin saturation curve for her right lung compare with that for her left?