Understanding Respiratory Volumes 186/2

What is Tidal Volume (TV)?

• The total volume of air in the lungs at maximum inflation.

• The amount of air remaining in the lungs after exhalation.

• The volume of air exchanged during forced expiration.

• Tidal Volume (TV) is the volume of air per breath during normal respiration.

What is the approximate volume of Tidal Volume?

• Approximately 250 mL

• Approximately 1000 mL

• Approximately 750 mL

• Approximately 500 mL

How much air can a healthy man inspire or expire per minute?

• 5 liters per minute

• 10 liters per minute

• 15 liters per minute

• 7.5 liters per minute

Define Inspiratory Reserve Volume (IRV).

• The amount of air that remains in the lungs after a forced exhalation.

• The total lung capacity minus the residual volume.

• The volume of air exhaled after a normal exhalation.

• Inspiratory Reserve Volume (IRV) is the maximum volume of air that can be inhaled after a normal inhalation.

What is the average volume of Inspiratory Reserve Volume?

• 3000 mL

• 1500 mL

• 2500 mL

• 4000 mL

Define Expiratory Reserve Volume (ERV).

• The amount of air remaining in the lungs after a forced expiration.

• The total lung capacity of an individual.

• Expiratory Reserve Volume (ERV) is the maximum amount of air that can be exhaled after a normal expiration.

• The volume of air inhaled after a normal inspiration.

What is the average volume of Expiratory Reserve Volume?

• 800 mL

• 1200 mL

• 1500 mL

• 1000 mL

What happens during the process of inspiration?

• Oxygen is absorbed directly into the bloodstream without lung involvement.

• Air is expelled from the lungs as the diaphragm relaxes.

• The diaphragm and intercostal muscles remain inactive during breathing.

• Air is drawn into the lungs as the diaphragm and intercostal muscles contract, increasing thoracic volume.

What happens during the process of expiration?

• Oxygen is converted to carbon dioxide in the lungs.

• Expiration is the process of expelling air from the lungs.

• Air is absorbed into the lungs.

• The diaphragm contracts to draw air in.

How does Tidal Volume relate to overall lung capacity?

• Tidal Volume is unrelated to lung function.

• Tidal Volume is only relevant during exercise.

• Tidal Volume is the maximum air the lungs can hold.

• Tidal Volume is a component of overall lung capacity.