1) which lipoprotein prevents our alveoli from collapsing? 2) which alveolar cells produce it ? 3) which newborn babies might be at risk of alveolar collapse because they do not yet produce lipoprotein?

41. Which sequence best represents the passage of CO2?     respiratory bronchioles--> alveolar duct-->alveoli     trachea-->primary bronchi-->secondary bronchi-->tertiary bonchi-->bronchioles--> terminal bronchioles     alveoli--> alveolar duct-->respiratory bornchioles-->terminal bronchioles     terminal bronchioles-->bronchioles-->tertiary bronchi-->secondary bronchi-->primary bronchi-->trachea

Where in the body is the partial pressure of carbon dioxide the highest? Select one: a) Alveolar air b) Systemic venous blood c) Tissue fluids d) Tissue cells e) Pulmonary venous blood Don't copy from Google

Which of the following forms the 'respiratory membrane' for the fetus (mark all that apply) 1.   maternal - simple squamous epithelium (placenta) 2.  fetus - simple squamous epithelium (lung) 3.  fetus - simple squamous epithelium (placenta) 4.  fetus - loose irregular connective tissue (placenta) 5.  maternal - simple squamous epithelium (lungs) Choose from the following: (A) 1, 3, and 4 (B) 1, 3, 4, and 5 (C) 2, 3 and 4 (D) 3 and 4 (E) 1, 2, 3, 4, and 5