Lung Function

Question 1

Respiratory control center is where in the brain?

Answer 1

Medulla & pons

Question 2

Inspiratory Capacity (IC) =

Answer 2

Tidal volume (Vt) + Inspiratory Reserve Volume (IRV)

Question 3

Functional Residual Capacity (FVC) =

Answer 3

Expiratory Reserve Volume (ERV)+ Residual Volume (RV)

Question 4

Vital capacity (VC) =

Answer 4

Inspiratory Reserve Volume (IRV)+ Tidal volume (VT) + Expiratory Reserve Volume (ERV)

Question 5

Total Lung Capacity (TLC) =

Answer 5

Tidal volume (VT) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV) + Residual Volume (RV)

Question 6

Lung volumes can de recorded by ?

Answer 6

Spirometer

Question 7

What is the the volume of gas exhaled in 1 sec by a forced expiration. from a full inspiration?

Answer 7

FEV 1

Question 8

TOTAL volume of gas that can be exhaled after a full inspiration.

Answer 8

Vital capacity

Question 9

What measurement reflects the rate of airflow ?

Answer 9

FEV 1

Question 10

What measurement can be used to gauge whether the airway is narrowed - asthma ?

Answer 10

FEV 1

Question 11

This measures the total volume of air you can blow out after a maximal inhalation

Answer 11

FVC = Forced Vital capacity

Question 12

What measurement can be used as an independent measure of pulmonary function but it is also used in a ratio with FEV 1

Answer 12

FVC = Forced Vital capacity

Question 13

The ratio of FEV1/FVC is a measure of ?

Answer 13

Potency (how open) of the airway

Question 14

If FEV1/FVC is below 80% it suggest that?

Answer 14

The airway is constricted - Asthma

Question 15

Name the disorder:

• A disorder which restricts the expansion of the lungs
• May be caused by stiffness of the lungs or chest wall, weakness of the
muscles or damaged nerves

Answer 15

Restrictive disorder

Question 16

Name the disorder:

• A disorder in which the airways are narrowed
• Air is exhaled more slowly than normal
• Residual volume may be higher than normal

Answer 16

Obstructive disorder

Question 17

Examples of Restrictive disorder

Answer 17

• Pulmonary fibrosis
• Sarcoidosis (an autoimmune immune disease)
• Obesity
• Muscular dystrophy

Question 18

Examples of Obstructive disorder

Answer 18

• Chronic obstructive lung disease (COPD) including chronic bronchitis and emphysema
• Asthma
• Cystic fibrosis

Question 19

• Make it more difficult to get air out of the lungs.
• Decrease FVC; Increased TLC, RV, and FRC

Are characteristics of what?

Answer 19

Obstructive Respiratory Diseases

Question 20

• Makes it more difficult to get air into the lungs.
• They “restrict” inspiration.
• Decreased VC; Decreased TLC, RV, FRC

Are characteristics of what?

Answer 20

Restrictive Respiratory Diseases

Question 21

A low FEV1/FVC ratio indicates an ?

Answer 21

Obstructive pattern

Question 22

A normal FEV1/FVC ratio indicates ?

Answer 22

Either a restrictive or normal pattern

Question 23

If the FEV1/FVC ratio is normal, a low forced vital capacity value indicates a ?

Answer 23

Restrictive pattern

Question 24

Helium dilution is used to measure ?

Answer 24

Residual volume

Question 25

When does pneumothorax occur?

Answer 25

When air enters the intrapleural space pneumothorax occurs and lung collapses