Understanding Lung Volumes and Capacities 187/1

What is the average range of Residual Volume (RV)?

• 1.0 to 1.2 liters

• 1.2 to 1.5 liters

• 2.0 to 2.5 liters

• 0.5 to 0.8 liters

What does Inspiratory Capacity (IC) include?

• Tidal Volume (TV) and Expiratory Reserve Volume (ERV)

• Tidal Volume (TV) and Functional Residual Capacity (FRC)

• Total Lung Capacity (TLC) and Residual Volume (RV)

• Inspiratory Capacity (IC) includes Tidal Volume (TV) and Inspiratory Reserve Volume (IRV).

Define Expiratory Capacity (EC).

• Expiratory Capacity (EC) refers to the total volume of air inhaled during a deep breath.

• Expiratory Capacity (EC) is the maximum volume of air that can be held in the lungs at full capacity.

• Expiratory Capacity (EC) is the amount of air remaining in the lungs after a normal exhalation.

• Expiratory Capacity (EC) is the total volume of air that can be forcibly exhaled after a normal breath.

What is the formula for Functional Residual Capacity (FRC)?

• FRC = ERV + RV

• FRC = VC + IC

• FRC = TV + IRV

• FRC = TLC - RV

What does Vital Capacity (VC) measure?

• The maximum amount of air that can be exhaled after a maximum inhalation.

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

• The total volume of air in the lungs at rest.

• The amount of air that can be inhaled in one breath.

How is Total Lung Capacity (TLC) defined?

• Total Lung Capacity (TLC) is the maximum amount of air the lungs can hold.

• Total Lung Capacity (TLC) is the amount of air remaining after exhalation.

• Total Lung Capacity (TLC) is the volume of air exchanged during normal breathing.

• Total Lung Capacity (TLC) is the total volume of air in the trachea.

What is the significance of Residual Volume in lung function?

• Residual Volume is primarily related to blood circulation.

• Residual Volume is only important for breathing out.

• Residual Volume has no impact on gas exchange.

• Residual Volume is crucial for maintaining lung stability and gas exchange.

How does Inspiratory Reserve Volume (IRV) contribute to IC?

• IRV decreases the Tidal Volume, reducing the total inspiratory capacity.

• IRV only contributes to Expiratory Reserve Volume (ERV) and not to IC.

• IRV contributes to IC by adding to the Tidal Volume, increasing the total inspiratory capacity.

• IRV has no effect on the Tidal Volume or inspiratory capacity.

What is the relationship between Tidal Volume (TV) and Expiratory Reserve Volume (ERV)?

• Tidal Volume and Expiratory Reserve Volume are both measures of lung capacity, with TV representing normal breathing and ERV representing additional exhalation capacity.

• Tidal Volume and ERV are unrelated and measure different physiological processes.

• Tidal Volume is the maximum amount of air that can be inhaled, whereas ERV is the minimum amount that can be exhaled.

• Tidal Volume is only measured during exercise, while ERV is measured at rest.

Why is it important to measure pulmonary capacities in clinical diagnosis?

• To determine body mass index (BMI)

• It is important to measure pulmonary capacities to assess lung function, identify respiratory diseases, and monitor treatment effectiveness.

• To measure heart rate during exercise

• To evaluate blood pressure levels