Exam 19: Clearing the Air: Respiratory and Cardiovascular Systems

Which compound provides a slippery consistency in the lungs preventing the alveoli walls from sticking together?

True or false: Of the 170,000 new cases of lung cancer diagnosed in the United States each year, greater than 90% of these patients are current smokers or former smokers.

What is the advantage of having grape-like clusters called alveoli as part of the respiratory system?

Which structures lining the tissue surface of the respiratory tract can be damaged by airborne particles?

A small mass of specialized muscle on the back wall of the right atrium, also known as the pacemaker, is medically known as what?

What is the physiological cause of a heart attack?

Which region of the circulatory system allows passage of nutrients and other small molecules to service nearby tissues?

-Refer to the figure to answer the following question: Which structure will connect to alveoli, where gas exchange will occur?

Where do blood stem cells originate?

Which structures return blood to the heart?

What is the contraction phase of the cardiac cycle?

Why is carbon monoxide deadly?

True or false: The emerging and scientific consensus about "secondhand smoke" supports the conclusion that while airborne particles emitted by the lit end of cigarettes pose a health risk to those who are exposed, the gases released by a cigarette are relatively harmless.

During exhalation, when the diaphragm relaxes and the volume of the chest cavity decreases, how is the air pressure inside the lungs affected?