Lung Capacity

A person has vital capacity of 5L and residual volume of 1.2 L. Total lung capacity –

• 6.2 L

• 4.8 L

• 500 ml

• None

What is the volume that remains in the lungs even after a forceful exhale

• expiratory reserve

• residual volume

• inspiratory reserve

• total lung capacity

The volume of a normal breath 

• 3000mL

• 2400mL

• 1200mL

• 500mL

What is the volume of one breath called?

• minute ventilation

• inspiratory capacity

• tidal volume

• vital capacity

What is the term used to describe the maximum amount of air that can be expelled from the lungs after maximum inhalation?

• Tidal volume

• Vital capacity

• Residual volume

• Inspiratory reserve volume

Match the following respiratory volumes and capacities to their definition.

• inhale/exhale at rest

• residual volume (RV)

• the volume remaining in lung after maximal expiration

• inspiratory reserve volume (IRV)

• maximum extra amount you can inspire after a normal inspiration

• expiratory reserve volume (ERV)

• TV + IRV + ERV

  (maximal inhale and maximal exhale)

• tidal volume (TV)

• maximum extra amount you can expire after a normal expiration

• vital capacity (VC)

Vital Capacity + Residual Volume=

• Vital Capacity

• Residual Volume

• Total Lung Capacity

• Inspiratory Rate

Volume of air that can be forcibly breathed in after a normal breath

• Expiratory Reserve Volume

• Inspiratory Reserve Volume

Calculations

FEV1/FVC

​ (a)   = Restrictive Diseases

-Volumes are decreased

0.6 = Obstructive Diseases

-Volumes Normal, flow rates are slower

​ (b)   = Emphysema

• 0.8 to 1.0

• 0.45 to 0.75

Max. Volume that can be inhaled from end inspiratory level (Top of Tidal Volume)

• Tidal Volume

• Exp. Reserve Volume

• Inspiratory Reserve Volume

• Residual Volume