gaseous exchange : Lung Volume terms

Question 1

Tidal volume (TV )

Answer 1

Volume of air inhaled or exhaled during normal rhythmic breathing.

Question 2

Inspiratory reserve volume (IRV)

Answer 2

Additional volume of air that can be forcefully inhaled after a tidal volume inhalation.

Question 3

Inspiratory capacity (IC)

Answer 3

Volume of air that can be inspired following a normal expiration.

Question 4

Expiratory reserve volume

Answer 4

additional volume of air that can be forcefully exhaled after a tidal volume exhalation

Question 5

Vital capacity (VC)

Answer 5

maximum volume of air that can be forcefully exhaled after a maximum forceful inhalation.

Question 6

Residual volume (RV)

Answer 6

Volume of air that always remains in the lungs and cannot be exhaled even after a maximum forceful exhalation.

Question 7

Functional residual capacity (FRC)

Answer 7

Volume of air in the lungs at the end of a normal passive exhalation.

Question 8

Total lung volume(TLV)

Answer 8

Maximum volume of air that the lungs can contain

Question 9

Ventilation rate

Answer 9

= tidal volume (TV) X no. of breaths per minute

Question 10

how are the lung volume being affected if the patient have obstructive pulmonary diseases (COPD) such as emphysema and chronic bronchitis?

Answer 10

• The functional residual capacity (FRC)
• The vital capacity (VC) decreases
• total lung volume (TLV ) is normal