A&P2 Lab 11 HW

What tissue type composes the structure at the end of the arrow?

elastic cartilage

What are the narrow bands indicated by the red arrow?

elastic fibers

Which of the labels on the image sits closest to the boundary between the upper and lower respiratory system?

A

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?

All of the listed responses are correct

Cystic fibrosis is an inherited respiratory disorder in which the mucociliary escalator no longer functions because of the presence of excessively dense and viscous mucus. Which of the following components of the respiratory system are affected by cystic fibrosis?

All of the listed responses are correct.

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

Henry's law

No air is moving in or out of the lungs in this image. Which of the following describes the pressures of the atmosphere ("P outside") and the lungs ("P inside")?

P inside = P outside

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?

PO2 in systemic capillaries leaving tissue cells: 100 mm Hg

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?

The pleural fluid that bonds (surface tension) the visceral and parietal pleurae together is broken by air.

Lung cancer claims more lives than other cancers, according to the CDC. 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.

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?

inhaling oxygen at higher partial pressures

Through which of the labeled structures does air flow on its way into the lungs?

the narrow grooves labeled B

Very aggressive pathogens such as the bacterium responsible for tuberculosis can easily overwhelm the protective features of the respiratory system. Less aggressive pathogens may be stopped by all of the following EXCEPT __________.

the olfactory epithelium