Lung Volumes and Capacity

Physiology: Which of the following lung volumes is defined as the air in the lung after a maximal exhalation?

• Residual Volume

• Functional Residual Capacity

• Vital Capacity

• Expiratory Reserve Volume

Pulm Pathophys: Which of the following would be diagnostic of restrictive lung disease? (Choose 2)

• FEV1/FVC < 70 %

• Increased total lung capacity

• FEV1/FVC > 80%

• Reduced Lung Volumes

When the diaphragm contracts...

• the volume of the thoracic cavity increases and the pressure decreases, causing air to rush into the lungs.

• the volume of the thoracic cavity decreases and the pressure increases causing air to rush out of the lungs. 

Match the lung volumes and capacities to the graph.

c

d

e

f

b

a

ERV

IRV

TV

RV

VC

TLC

Match the following respiratory volumes and capacities to their definition.

• inhale/exhale at rest

• residual volume (RV)

• maximum extra amount you can inspire after a normal inspiration

• vital capacity (VC)

• the volume remaining in lung after maximal expiration

• tidal volume (TV)

• TV + IRV + ERV

  (maximal inhale and maximal exhale)

• expiratory reserve volume (ERV)

• maximum extra amount you can expire after a normal expiration

• inspiratory reserve volume (IRV)

What equipment is used to measure air being inspired and expired?

• spirometre

• spirometer

• inspirometer

• expirometer

When air pressure inside the lungs is less than air pressure in the atmosphere...

• Air moves into the lungs

• Air moves out of the lungs

Put the following in order as they occur in an inspiration.

• intrapulmonary pressure decreases

• diaphragm contracts and moves downward

• volume of thoracic cavity increases

• air flows into lungs

Put the following in order as they occur in an expiration.

• intrapulmonary pressure increases

• diaphragm relaxes and moves upward

• volume of thoracic cavity decreases

• air flows out of the lungs

When air pressure inside the lungs is greater than air pressure in the atmosphere...

• Air moves into the lungs

• Air moves out of the lungs

Tags

NGSS.MS-LS1-3