This is a fluid that reduces the tendency of the alveoli to collapse.

1. This is a fluid that reduces the tendency of the alveoli to collapse.mucoussurfactantpuslymphinterstitial fluid2. Which of the following structures is the main site of gas exchange within the respiratory system?bronchipleurabronchiolesalveolinasal conchae3. These cells remove dust and debris from alveolar spaces.alveolar cellsalveolar macrophagessquamous cellssurfactant-secreting cellsgoblet cells4. The amount of air that moves into and out of the lungs during one breath is called thetidal volume.anatomical dead space.inspiratory reserve volume.expiratory reserve volume.residual volume.5. The pressure of a specific gas in a mixture of gases is called itsintrapulmonary pressure.atmospheric pressure.partial pressure.intrapleural pressure.interstitial pressure.6. Which of the following is true regarding the transport of carbon dioxide?Most CO2 is transported dissolved directly in the blood plasma.Most CO2 is transported attached to hemoglobin.Most CO2 is transported in the plasma as bicarbonate ions.Most CO2 is transported as chloride ions.Most CO2 is transported attached to the heme portion of hemoglobin.7. How do the respiratory and cardiovascular systems work together?Both need to cooperate to supply the body with O2 and eliminate CO2.Both are required for the exchange of gases between blood in systemic capillaries and tissue cells.Both are required for the exchange of gases between the blood in the pulmonary capillaries and the alveoli.All of these choices illustrate how the respiratory and cardiovascular systems work together.8. The muscles used during quiet inhalation are thesternocleidomastoid muscles, scalene muscles, and pectoralis minor muscles.diaphragm and internal intercostal muscles.diaphragm, external intercostal muscles, and the external and internal oblique muscles.diaphragm and external intercostal muscles.9. What is the relationship between hemoglobin and PO2?When blood PO2 is high, hemoglobin binds with large amounts of O2.When blood PO2 is low, hemoglobin binds with large amounts of O2.When blood PO2 is high, hemoglobin releases O2.When blood PO2 is low, oxyhemoglobin is produced.10. A decrease in vital capacity with age is due toa decrease in the elasticity of the alveoli.a decrease in the blood level of O2.the diminished ciliary action of the epithelium lining of the respiratory tract.increased susceptibility to lung disorders.