A&PII- Lab 11 Written Exam Questions & Answers.
In a condition known as pneumothorax, the integrity of the pleural cavity is lost, which leads to a collapsed lung. What is one explanation for why this occurs? - CORRECT ANSWER The pleural fluid that bonds the visceral and parietal pleurae togethe...
A&PII- Lab 11 Written Exam Questions &
Answers.
In a condition known as pneumothorax, the integrity of the pleural cavity is lost, which leads to a
collapsed lung. What is one explanation for why this occurs? - CORRECT ANSWER The pleural fluid that
bonds the visceral and parietal pleurae together is broken by air.
Blood gas analyses provide diagnostic information regarding the efficiency of gas exchange at the lungs
and in peripheral tissues. Which of the following values are NOT within normal limits? - CORRECT
ANSWER PO2 in systemic capillaries leaving tissue cells: 100 mm Hg
The physiological effects of nitrogen in the human body are not fully understood as of yet except during
decompression sickness. Decompression sickness occurs when the partial pressure of nitrogen drops,
and nitrogen no longer stays in solution but forms bubbles, causing tremendous pain in joints. This
relationship between partial pressure and solubility is explained in __________. - CORRECT ANSWER
Henry's law
Lung cancer claims more lives than other cancers, according to the Centers for Disease Control. Because
of their high mitotic rate, epithelial cells are particularly prone to tumor formation. Choose the best
answer as to where within the respiratory tract you would NOT find such epithelial cells. - CORRECT
ANSWER You would find epithelial cells in all of the listed answer choices.
In patients with emphysema, the alveolar surface area decreases, thereby decreasing the area available
for gas exchange. In addition, vascularity declines, making it harder still to transport adequate amounts
of oxygen. Which of the following would help an emphysema patient bind as much oxygen as possible
with the limited heme units available? - CORRECT ANSWER inhaling oxygen at higher partial pressures
Carbon monoxide poisoning is possible because carbon monoxide binds readily with heme at very low
partial pressures compared to those of oxygen. Besides partial pressure, what else determines the
affinity of oxygen molecules for heme? - CORRECT ANSWER pH levels
BPG concentration
temperature
All of the listed responses are correct.
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