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Ch. 22 Online quiz

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nessaram994's version from 2017-10-22 18:23

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Question Answer
Most inhaled particles such as dust do not reach the lungs because of the ________. a. abundant blood supply to nasal mucosa b. ciliated mucus lining in the nose c. porous structure of turbinate bones d. action of the epiglottis b. ciliated mucus lining in the nose
Which of the following provide the greatest surface area for gas exchange? a. alveoli b. respiratory bronchioles c. alveolar ducts d. terminal bronchioles a. alveoli
O2 and CO2 are exchanged in the lungs (and through all cell membranes) by the process of ________. a. diffusion b. osmosis c. active transport d. filtration a. diffusion
How does surfactant prevent the alveoli from collapsing? a. By increasing the cohesive force between water molecules, thereby increasing surface tension b. By warming and humidifying the air before it enters c. By protecting the surface of alveoli from dehydration and other environmental variations d. By interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid d. By interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid
The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the ________. a. temperature is lower at higher altitudes b. concentration of oxygen and/or total atmospheric pressure is lower at high altitudes c. concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes d. basal metabolic rate is higher at high altitudes b. concentration of oxygen and/or total atmospheric pressure is lower at high altitudes
________ is the most powerful respiratory stimulus for breathing in a healthy person. a. Alkalosis b. The increase of carbon dioxide c. The loss of oxygen in tissues d. Acidosis b. The increase of carbon dioxide
Which of the following choices best describes the forces that act to pull the lungs away from the thorax wall? (A force that acts to collapse the lungs) a. lung compliance and surfactant b. the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid c. intrapulmonary pressure d. compliance and transpulmonary pressures b. the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid
The following oxygen-hemoglobin dissociation curve depicts two types of hemoglobin, HbA( further right on the graph) and HbF( further left on the graph), which on has the higher affinity of oxygen? a. not enough information to determine b. they have equal affinity for oxygen c. HbF d. HbAc. HbF
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