Respiratory Physiology (Unit 6 Standard C)

Which of the following steps is not involved in external respiration?

• Pulmonary ventilation

• Carbon dioxide exchange of muscle tissues

• Gas diffusion

• Transport of oxygen and carbon dioxide in alveolar capillaries

What separates the parietal and visceral pleurae are separated by

• Water

• Air

• Pleural fluid

• Fats

Which of the following is a reason that the respiratory membrane is efficient for gas exchange?

• The differences in partial pressure are minimal

• The distances involved in gas exchange are large

• Gases are lipid soluble

• Total surface area is small

Decompression sickness is caused by

• Partial pressure of calcium in the air

• Partial pressure of nitrogen in air

• Partial pressure of sodium in the air

• Partial pressure of carbon dioxide in water

 What muscles are used in breathing in and breathing out?

• Diaphragm and intercostals

• Diaphragm and lungs

• Lungs and ribs

• Lungs and diaphragm

What is the volume of one breath called?

• Minute ventilation

• Inspiratory capacity

• Tidal volume

• Vital capacity

During inspiration, the intrapleural pressure mostly

• Decreases

• Increases

• Fluctuates rapidly

• Stays the same

 When the diaphragm relaxes this creates

• a decrease in chest volume

• an increase in chest volume

• an increase in lung capacity

• no change in air volume

Forced breathing, or hyperpnea involves

• Passive inspiratory movement

• Active inspiratory movement

• Diaphragmatic breathing

• Coastal breathing

Which diagram best illustrates the function of an alveolus?

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