Prac. 7 - Lung

Question 1

Tidal Volume (TV)

Answer 1

the volume of air exchanged during normal inspiration or expiration.

Question 2

Inspiratory Reserve Volume (IRV

Answer 2

the maximal volume that can be inspired in addition to a tidal inspiration.

Question 3

Expiratory Reserve Volume (ERV)

Answer 3

the maximal volume that can be expired in addition to a tidal expiration.

Question 4

Residual Volume (RV)

Answer 4

the volume of air remaining in the lungs at the end of a maximal expiration. As it cannot be breathed out, this volume cannot be measured using an ordinary spirometer.

Question 5

Inspiratory Capacity (IC)

Answer 5

the maximal volume of air that can be inhaled after normal expiration (IC = TV + IRV).

Question 6

Vital Capacity (VC

Answer 6

the greatest volume that can be exhaled after maximal inspiration (VC = TV + IRV + ERV). This is a useful test of the ability to inflate and deflate the lungs.

Question 7

Functional Residual Capacity (FRC)

Answer 7

the volume of air remaining in the lungs after normal expiration (FRC = ERV + RV).

Question 8

Total Lung Capacity (TLC)

Answer 8

the volume of air in the lungs at the end of a maximal inspiration (TLC = VC + RV)

Question 9

Restrictive interference

Answer 9

the lungs ability to expand is impaired

Question 10

Obstructive interference

Answer 10

caused by obstruction or narrowing of the airways, e.g. asthma or bronchitis.