L5 Lung Volumes and Capacities in Medical Physiology

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What is the function of a spirometer?

Monitor brain activity

Measure lung volumes and capacities (correct)

Assess heart rate

Analyze blood oxygen levels

Which lung function test is related to time?

Peak Expiratory Flow Rate (PEFR) (correct)

Tidal volume

Inspiratory reserve volume

Residual volume

What is the purpose of lung function tests?

Monitor kidney function

Measure heart function

Evaluate liver health

Assess efficiency of breathing mechanism (correct)

Which lung volume is NOT measured using a spirometer?

Residual volume Signup and view all the answers

What is the purpose of Forced Vital Capacity (FVC) test?

Evaluate respiratory muscle strength Signup and view all the answers

Which lung capacity represents the total amount of air the lungs can hold?

Vital capacity Signup and view all the answers

What is the normal value for Vital Capacity (VC)?

4600 ml Signup and view all the answers

Which lung volume is increased in old age and in obstructive lung diseases like emphysema?

Residual Volume (RV) Signup and view all the answers

What is the method used to measure Residual Volume (RV)?

Helium dilution Signup and view all the answers

What is the normal value for Inspiratory Capacity (IC)?

3500 ml Signup and view all the answers

Which lung capacity is the sum of Tidal Volume (TV), Inspiratory Reserve Volume (IRV), and Expiratory Reserve Volume (ERV)?

Vital Capacity (VC) Signup and view all the answers

What is the normal value for Tidal Volume (TV)?

500 ml Signup and view all the answers

Which lung capacity is the sum of Residual Volume (RV) and Expiratory Reserve Volume (ERV)?

Functional Residual Capacity (FRC) Signup and view all the answers

What is the normal value for Expiratory Reserve Volume (ERV)?

1100 ml Signup and view all the answers

What is the normal value for functional residual capacity (FRC)?

2300 ml Signup and view all the answers

What is the significance of functional residual capacity (FRC)?

Helps in continuous exchange of gases across the lungs and blood between breaths Signup and view all the answers

In which conditions is the functional residual capacity (FRC) increased?

Obstructive lung diseases Signup and view all the answers

In which conditions is the functional residual capacity (FRC) decreased?

Restrictive lung diseases Signup and view all the answers

What is the normal value for total lung capacity (TLC)?

6000 ml Signup and view all the answers

Which of the following lung volumes and capacities are not measured completely by a spirometer?

Residual volume (RV), functional residual capacity (FRC), and total lung capacity (TLC) Signup and view all the answers

What is the difference between forced vital capacity (FVC) and vital capacity (VC)?

FVC measures the maximum amount of air exhaled forcefully, while VC measures the maximum amount of air exhaled normally. Signup and view all the answers

What percentage of the forced vital capacity (FVC) can be exhaled in the majority of cases?

80% Signup and view all the answers

How do lung volumes and capacities generally differ between men and women?

Lung volumes and capacities are usually 20% to 30% less in women than in men. Signup and view all the answers