NURS113 Lecture Notes - Lecture 7: Airway Obstruction, Pulmonary Circulation, Hypoventilation
23 Nov 2017
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A: gas exchange between respiratory and cardiovascular system. A: everything past the terminal bronchioles i. e. alveoli. Q: describe how gas exchange happens in the alveoli? (basic) A: when air gets to the alveolar sacs, it is wrapped with pulmonary capillaries and will diffuse into the capillaries by simple diffusion. A: you need good capillaries and alveolar sacs. Q: what would be an abnormal situation here? (2) A: if there aren"t enough capillaries, or if the alveolar sacs are collapsed. Q: what are the steps in external respiration? (4) A: the flow of air through the air passages into the acini. A: the flow of blood in the pulmonary circulation to the alveolar capillaries. A: movement of gas from a high-concentration area to a low-concentration area. A: the passage of oxygen and carbon dioxide from alveolar air to blood and vice versa. Q: what are some examples of perfusion/problem capillary problem? (3) (think, what does perfusion mean!)
