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Exam 19: Respiratory System

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Question 31

Multiple Choice

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Oxygen plays a minor role in control of normal respiration because 

A) oxygenated blood is < 95% saturated.
B) deoxygenated venous blood is < 5% saturated.
C) oxygenated blood is more sensitive to CO₂.
D) deoxygenated venous blood is 75% saturated.

E) All of the above
F) A) and B)

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Question 32

Multiple Choice

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Exposure to secondhand smoke can cause or increase risk of

A) high altitude sickness and sleep apnea.
B) heart disease, lung cancer, and low birth weight.
C) pneumonia and tuberculosis.
D) sarcoidosis, multiple sclerosis, and vasculitis

E) B) and D)
F) A) and B)

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Question 33

Multiple Choice

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What is globin?

You are singing a song at karaoke and reach a part that requires a high pitch. To hit the high notes, you

You have just jumped into the ocean after your boat began to sink. Luckily, you found an air tank before you jumped. Unluckily, the air tank has been used. The gauge says there is now exactly 30,000mL of air left in the tank. In a panic, you take in the full inspiratory reserve volume each time you inhale. How many times can you inspire at this panicked volume before the tank runs out? 

A flashlight placed just below the eyebrow in a darkened room illuminates the

Laryngitis occurs when the larynx becomes irritated and inflamed from an infection, acid reflux, or strenuous use of the vocal cords. Which of the following symptoms would you directly associate with having laryngitis, considering the structures affected?

Which of the following does NOT contribute to the increase of breathing rate during exercise? 

The volume of air that enters the lungs during forced maximal inspiration is the

Emphysema results in

The hypoxia associated with high altitude can cause

One day, Julien is stung by a bee while he is outside and experiences anaphylaxis (a severe allergic reaction). His throat swells shut and he begins to suffocate. Luckily, a doctor finds Julien, recognizes that he cannot breathe, and decides to perform an emergency surgery that will allow him to breathe even though his throat is closed. The doctor performs a ________.

Carbon monoxide is toxic because it destroys respiratory areas in the brain.

The pharynx is an enlargement at the top of the trachea that houses the vocal cords.

Which of the following bones does not house a sinus?

The inflation reflex is activated when stretch receptors are stimulated during inspiration.

An experimental treatment cultures stem cells from a newborn's umbilical cord. In a lab dish, the stem cells give rise to type II cells, which in turn give rise to more type I cells. These stem cells will be added to the extracellular matrix of a donated lung which has been stripped of its respiratory cells. How will the cells act after they grow in the donated lung?

The intensity (volume) of a vocal sound is a result of the

Alveoli are kept clean by the action of

You have just jumped into the ocean after your boat began to sink. Luckily, you found an air tank before you jumped. Unluckily, the air tank has been used. The gauge says there is now exactly 30,000mL of air left in the tank. Fortunately, you know how to meditate and you've calmed yourself to the point where you are only taking normal, resting breaths. How many times can you inspire at this normal volume before the tank runs out?