Which of the following is the respiratory membrane composed of? A) respiratory bronchioles and alveolar ducts b) respiratory bronchioles and alveolar sacs d) alveolar sacs and alveolar ducts e) alveolar and capillary walls and their fused basement membranes

Select the correct statement regarding the Intrapulmonary pressure A) difference of atmospheric and respiratory pressures B) it is always negative C) pressure within the alveoli of the lungs D) pressure in the space between the visceral and parietal pleurae

Explain the phrase, “breathing by using negative pressure” ( How do we breath using the process of Negative Pressure breathing)?

Which of the following would increase the diffusion of oxygen from the alveoli into the bloodstream?     a)  A decrease in total lung capacity   b)  A decrease in circulating red blood cells in the blood   c)  An increase in the partial pressure of oxygen in the blood vessels surrounding the alveoli   d)  An increase in the number of blood vessels surrounding the alveoli   e)  A decrease in the pressure gradient between the alveoli and the bloodstream