How is alveolar gas exchange affected by emphysema and pneumonia?
What will be an ideal response?
With pneumonia, if the lungs become edematous, the thickness of the exchange membrane may increase dramatically, restricting gas exchange, and body tissues begin to suffer from hypoxia. With emphysema, the lungs become progressively less elastic and more fibrous, which hinders both inspiration and expiration. Gas exchange remains adequate initially, but muscular activity must be enlisted to expire. Additionally, a symptom of emphysema is fusion of alveoli, resulting in less surface area for gas exchange.
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A. External intercostals B. Scalenes C. Transversus thoracis D. Internal intercostals E. Serratus posterior inferior
The placenta, a vitally important metabolic organ, is made up of a contribution from mother and fetus. Which portion is from the fetus?
A) yolk sac B) umbilicus C) chorion D) amnion
The blood transports more CO2 in the form of ________ than in any other form
A) carboxyhemoglobin B) carbaminohemoglobin C) bisphosphocarbonate D) bicarbonate ions E) dissolved CO2 gas
There are two brachiocephalic veins and ________ brachiocephalic artery (or arteries)
A) no B) 1 C) 2