Exam 12: The Respiratory System

The following questions refer to the accompanying diagram of a normal spirogram. The wave labels have been removed and replaced with letters A-H. Match the letter with list of missing terms below to complete the diagram. -inspiratory reserve volume

In the absence of pulmonary surfactant, smaller alveoli display a larger inward-directed pressure than do larger alveoli.

Approximately what percentage of oxygen is transported in the blood bound to Hb?

Which of the following statements concerning the dorsal respiratory group (DRG) is correct?

At the end of a normal expiration when outward air flow has ceased,

The lungs contain:

Exhaled air passes from the larynx through the trachea.

An increase in airway resistance and an increase in alveolar surface tension both increase the work of breathing.

As the thoracic cavity enlarges, the lungs enlarge.

The apneustic center

The inspiratory muscles include the

-At a PO₂ of 40 mm Hg, how many ml of oxygen (per 100 ml of blood) remain in the blood?

The volume occupied by the conducting airways is known as the ____________________.

A person with asthma has more difficulty expiring than inspiring, giving rise to the characteristic "wheeze" as air is forced out through the narrowed airways.

How are respiratory events regulated?

Type I alveolar cells

The following questions refer to the accompanying diagram of a normal spirogram. The wave labels have been removed and replaced with letters A-H. Match the letter with list of missing terms below to complete the diagram. -vital capacity

A transmural pressure gradient exists across the lung wall because the ____ pressure is less than the ____ pressure.

If 20% of the air is composed of O₂, the partial pressure of oxygen at sea level where atmospheric pressure is 760 mm Hg is

The vocal folds are found in the ____________________ among the respiratory passages.