chapter 20 section (external internal resp and pulmonary ventation)

Dalton's law states that a. in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. b. the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure. c. gas volume and pressure are inversely proportional. d. gas volume and temperature are directly proportional. e. gas pressure is inversely proportional to gas volume

a. in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. ==

What is the relationship between the pressures at label "8"? bottom of lungs graph a. P outside = P inside b. P outside > P inside c. P outside < P inside d. P outside + P inside e. P outside - P inside

c. P outside < P inside

External respiration involves the a. utilization of oxygen by tissues to support metabolism. b. exchange of dissolved gases between the blood and the interstitial fluid. c. diffusion of gases between the alveoli and the circulating blood. d. binding of oxygen by hemoglobin. e. movement of air into and out of the lungs

c. diffusion of gases between the alveoli and the circulating blood. ==

The process by which dissolved gases are exchanged between the blood and interstitial fluids is a. external respiration. b. pulmonary ventilation. c. internal respiration. d. cellular respiration. e. breathing.

c. internal respiration. ==

In inhaled dry air, which of the following is found in the highest concentration? a. water vapor (H2O) b. carbon dioxide (CO2) c. nitrogen (N2) d. oxygen (O2)

c. nitrogen (N2) ==

Which of the following is greatest? a. the partial pressure of carbon dioxide in inspired air b. the partial pressure of carbon dioxide in arterial blood c. the partial pressure of carbon dioxide in venous blood d. the partial pressure of carbon dioxide in alveolar air e. the partial pressure of carbon dioxide in expired air

c. the partial pressure of carbon dioxide in venous blood ==

Which of these descriptions best matches the term external intercostal? a. affects lung compliance b. accessory muscle of expiration c. accessory muscle of inspiration d. contraction increases airway resistance e. primary muscle of inspiration

e. primary muscle of inspiration

Pulmonary ventilation refers to the a. movement of air into and out of the lungs. b. utilization of oxygen. c. movement of dissolved gases from the blood to the interstitial space. d. movement of dissolved gases from the alveoli to the blood. e. movement of dissolved gases from the interstitial space to the cells

a. movement of air into and out of the lungs

Regarding external respiration, which is correct? a. Oxygen diffuses into the tissue at peripheral capillaries. b. By the time the blood enters the pulmonary venules, it has reached equilibrium with the alveolar air. c. Carbon dioxide diffuses into the blood. d. Blood arriving in the pulmonary arteries has a higher PO2 and a lower PCO2 than does alveolar air

b. By the time the blood enters the pulmonary venules, it has reached equilibrium with the alveolar air. ==

What is the relationship between the pressures at label "3"? a. P outside = P inside b. P outside > P inside c. P outside < P inside d. P outside + P inside e. P outside - P inside

b. P outside > P inside

Air moves out of the lungs when the pressure inside the lungs is a. less than the pressure in the atmosphere. b. greater than the pressure in the atmosphere. c. less than intrapulmonic pressure. d. equal to the pressure in the atmosphere. e. greater than intraalveolar pressure

b. greater than the pressure in the atmosphere

What pressure will be present in the space labeled "5"? inside part of lung a. alveolar pressure b. intrapulmonary pressure c. subalveolar pressure d. subatmospheric pressure e. atmospheric pressure

b. intrapulmonary pressure

During inhalation: a. pressure inside the lungs increases above atmospheric pressure. b. pressure inside the lungs is less than pressure outside the body. c. thoracic volume decreases. d. the diaphragm moves superiorly

b. pressure inside the lungs is less than pressure outside the body.

When there is no air movement, the relationship between the intrapulmonary and atmospheric pressure is that a. intrapulmonary pressure is greater than atmospheric. b. they are equal. c. atmospheric pressure is more than intrapulmonary. d. atmospheric pressure is less than intrapulmonary. e. intrapulmonary pressure is less than atmospheric

b. they are equal

Henry's law states that a. gas pressure is inversely proportional to gas volume. b. in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. c. the volume of gas that will dissolve in a solvent is proportional to the partial pressure of that gas. d. gas volume and pressure are inversely proportional. e. gas volume and temperature are directly proportional

c. the volume of gas that will dissolve in a solvent is proportional to the partial pressure of that gas. ==

Regarding Boyle's law, which condition, for a gas in a closed container and at a constant temperature, is correct? a. There is a direct proportionality between pressure and volume. b. If the volume of the gas is increased, its pressure will increase. c. If the volume of the gas is decreased, fewer collisions of gas molecules occur per unit time. d. If the volume of the gas is decreased, its pressure will increase

d. If the volume of the gas is decreased, its pressure will increase

Expiratory movements are produced by contraction of the ________ muscle(s). a. external intercostal b. diaphragm c. serratus anterior d. internal intercostal e. scalene

d. internal intercostal

When the diaphragm and external intercostal muscles contract, a. expiration occurs. b. the volume of the lungs decreases. c. the lungs shrink. d. the volume of the thorax increases. e. the volume of the thorax decreases

d. the volume of the thorax increases