Multiple ChoiceGas 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?178views4rank
Textbook 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.245views
Textbook QuestionHenry'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.188views
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.1303views
Textbook QuestionYou 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?200views
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.1484views4rank
Textbook QuestionWhat is the significance of (b) Dalton's law, to the process of respiration?215views
Textbook QuestionFill in the blanks: When the alveolar Po₂ decreases, the pulmonary arterioles_____. When the arteriolar Pco₂ increases, the bronchioles_______.189views
Textbook 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.237views
Textbook 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.238views
Textbook QuestionOxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by a. active transport, b. diffusion, c. filtration, d. osmosis.274views
Textbook 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?236views
Multiple ChoiceHow is Henry’s law related to the amount of gas that can be exchanged in the alveoli?202views3rank
Textbook QuestionWhat is it about the structure of the alveoli that makes them an ideal site for gas exchange?377views
Textbook QuestionWhy do individuals who are anemic generally not exhibit an increase in respiratory rate or tidal volume, even though their blood is not carrying enough oxygen?355views
Textbook QuestionWhat happens to the process of respiration when a person is sneezing or coughing?225views
Multiple ChoiceGas 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?163views4rank
Multiple ChoiceAir 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?181views2rank
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