Exam 25: Structure and Function of the Pulmonary System

During passive inspiration, muscular contraction of the diaphragm causes air to move into the lung. The mechanisms that drive air movement during passive inspiration are:

The pressure required to inflate an alveolus is inversely related to:

If a patient's hemoglobin concentration (Hb) is 14 g/100 ml and arterial oxygen saturation (SaO₂) is 98%, what would be his arterial oxygen content? Remember that 1.34 ml O₂ is the maximum amount of oxygen that can be transported per gram of hemoglobin. Hint: O₂ content = (1.34 × Hb) SaO₂.

All of the following may be found in the walls of the respiratory bronchi except:

Diffusion of respiratory gases takes place at the membrane between the:

The receptors that respond to increased pulmonary capillary pressure are called:

The movement of blood into and out of the capillary beds of the lungs to the body organs and tissues is called:

A 42-year-old male was involved in a motor vehicle accident during which he suffered a severe head injury. He died shortly after the accident from loss of respiration. The area of the brain most likely involved is the:

A newborn is in respiratory distress and requires ventilation. Tests reveal that he does not produce surfactant due to the absence of:

The nasopharynx is lined with a ciliated mucosal membrane with a highly vascular blood supply. One function of the membrane is to:

In a patient with acidosis or a fever, you would expect the oxyhemoglobin dissociation curve to:

After entering a room of chemical fog, a 20-year-old male cannot stop sneezing. Which of the following structures is primarily responsible for his sneezing?

At sea level, the partial pressure of oxygen is approximately:

The slit-shaped space between the true vocal cords forms the:

Surfactant facilitates alveolar distention and ventilation by:

The primary function of the pulmonary system is best described as the:

Which of the following volumes represents an average total lung capacity for a healthy adult?

Which of the following occurs when there is a balance between outward recoil of the chest wall and inward recoil of lungs at rest?

If an individual with respiratory difficulty was retaining too much carbon dioxide, which of the following receptors would be stimulated in an attempt to maintain a normal homeostatic state?

Under most circumstances, increased work of breathing results in: