Biology 106 Respiratory Quiz

If tissue oxygen demand increases and respiratory rate and tidal volume remain the same, what happens? A.) Alveolar PO2 decreases; blood and tissue PCO2 increases. B.) Alveolar PO2increases; blood and tissue PCO2 decreases.

A.) Alveolar PO2 decreases; blood and tissue PCO2 increases.

________ is the amount of air that moves into the respiratory system during a single respiratory cycle under resting conditions. A.) Tidal volume B.) Inspiratory reserve volume C.) Inspiratory capacity D.) Residual volume E.) Expiratory reserve volume

A.) Tidal volume

Which of the following factors would increase the amount of oxygen discharged by hemoglobin to peripheral tissues? A.) decreased pH B.) increased tissue PO2 C.) decreased temperature D.) decreased amounts of BPG E.) None of the answers is correct.

A.) decreased pH

The process by which dissolved gases are exchanged between the blood and interstitial fluids is A.) internal respiration. B.) external respiration. C.) breathing. D.) cellular respiration. E.) pulmonary ventilation.

A.) internal respiration.

What pressure will be present in the space labeled "5"? A.) intrapulmonary pressure B.) alveolar pressure C.) atmospheric pressure D.) subalveolar pressure E.) subatmospheric pressure

A.) intrapulmonary pressure

Which of the following would be greater? A.) the percent of oxygen saturation of hemoglobin when the pH is 7.6 B.) the percent of oxygen saturation of hemoglobin when the pH is 7.2

A.) the percent of oxygen saturation of hemoglobin when the pH is 7.6

At the level of the alveoli, where does gas exchange occur? A.) within the red blood cells B.) at the respiratory membrane C.) between type II pneumocytes and red blood cells D.) at the interconnections between adjacent alveoli E.) in the alveolar ducts

B.) at the respiratory membrane

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.) greater than intraalveolar pressure. D.) equal to the pressure in the atmosphere. E.) less than intrapulmonic pressure.

B.) greater than the pressure in the atmosphere.

Which of the following is greater? A.) the partial pressure of oxygen in the alveoli B.) the partial pressure of oxygen in atmospheric air

B.) the partial pressure of oxygen in atmospheric air

Which of the following would be greater? A.) the percent of oxygen saturation of hemoglobin when the temperature is 43 degrees centigrade B.) the percent of oxygen saturation of hemoglobin when the temperature is 38 degrees centigrade

B.) the percent of oxygen saturation of hemoglobin when the temperature is 38 degrees centigrade

The sites of gas exchange within the lungs are the A.) falciform ligaments. B.) bronchioles. C.) alveoli. D.) pleural spaces. E.) terminal bronchioles.

C.) alveoli.

Which of the following can be calculated if the tidal volume and respiratory rate are known? A.) expiratory reserve volume B.) anatomic dead space C.) respiratory minute volume D.) minimal volume E.) inspiratory reserve volume

C.) respiratory minute volume

Henry's law states that A.) gas pressure is inversely proportional to gas volume. B.) gas volume and pressure are inversely proportional. C.) the volume of gas that will dissolve in a solvent is proportional to the partial pressure of that gas. D.) 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. 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.

Which of the following statements about the chloride shift is false? A.) It is driven by a rise in PCO2. B.) It involves a movement of bicarbonate ions into the plasma. C.) It involves a movement of chloride ion into RBCs. D.) It causes RBCs to swell. E.) It depends on the chloride-bicarbonate countertransport mechanism.

D.) It causes RBCs to swell.

All of the below are sensory stimuli that can modify the activities of the respiratory center except A.) stretch receptors. B.) irritant chemical or physical particles. C.) chemoreceptors. D.) baroreceptors. E.) thermoreceptors.

E.) thermoreceptors.