Exam 19: Respiratory System

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?

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?

Alveoli are kept clean by the action of

The hypoxia associated with high altitude can cause

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

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

What is globin?

Which of the following bones does not house a sinus?

Exposure to secondhand smoke can cause or increase risk of

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

Oxygen plays a minor role in control of normal respiration because 

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

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

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? 

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?

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

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

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 ________.

Emphysema results in