burning from the terrorist attacks that had brought down the build- ings. The greatest danger to

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BIOS 254 Chapter 19 Lecture Assignment

• Emily is winded from running to her car from the supermarket. It is late at night and she

thinks she is being followed. Which of the following receptors would not be involved in regulating her breathing rate?–Answer Baroreceptors

• In October 2001 at the site of the World Trade Center in New York City, fires were still

burning from the terrorist attacks that had brought down the build- ings. The greatest danger to the respiratory system was –Answer very small particles of debris.

• The pharynx functions as a , whereas the larynx functions as a

.–Answer common passageway for air and food; passageway for air only

• The trachea

–Answer is all of the above

• Peripheral receptors stimulate the respiratory areas resulting in

–Answer increased respiratory rate.

• The respiratory areas are in the

–Answer pons and medulla oblongata.

• Respiratory distress syndrome in newborns is caused by

–Answer lack of surfactant.

• Hyperventilation is usually accompanied by a(n) 1 / 2

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–Answer decrease in blood CO2 concentration and a rise in pH.

• Which of the following factors does not directly affect breathing rate?

–Answer pH

• The amount of oxygen released from oxyhemoglobin increases when

–Answer car- bon dioxide concentration increases.

• During an asthma attack, the patient usually finds it most difficult to

–Answer ex- hale.

• Arielle is an 8-year-old with cystic fibrosis. For 30 minutes each morning and evening, a

parent holds her body in various positions and massages and kneads the areas over her lungs to dislodge the abundant, sticky mucus, which Arielle spits into a jar. She also takes medication - an enzyme - that thins the mucus. If she didn't take these measures, the mucus in her lungs would most likely increase her risk of –Answer infection.

• The pitch of a vocal sound is controlled by changing the

–Answer tension on the vocal cord.

• Baby Timothy suffers from apnea and is hooked up to a monitor to warn his parents when he

stops breathing. Timothy's dad snores very loudly. Timothy's condition differs from his father's in that infant apnea is –Answer a central problem of respiratory control.

• Changes in the respiratory system that accompany aging are

–Answer all of the above.

• Oxygen plays a minor role in control of normal respiration because

–Answer

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