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System 1: Respiratory AM > Physiology: Lung Volumes and Compliance > Flashcards

Physiology: Lung Volumes and Compliance Flashcards

1
Q

What is anatomical dead space ?

A

Volume of gas occupied by conducting airways and not available for gas exchange

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2
Q

What is the anatomical dead space equal too?

A

~150ml each

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3
Q

What is Tidal Volume?

A

TV - the volume of air breathed in and out of the lung in each breath

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4
Q

What is Expiratory Reserve Volume?

A

ERV - Maximum volume of air which can be expelled out the lungs at the end of of a normal expiration

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5
Q

What is Inspiratory Reserve Volume?

A

IRV - maximum volume of air which can be drawn into the lungs at the end of a normal inspiration

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6
Q

What is the Residual Volume?

A

RV - The volume of gas at the end of a maximal expiration

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7
Q

What is the Vital Capacity?

A

VC = Tidal Volume + Inspiratory Reserve Volume + Expiratory Reserve Volume

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8
Q

What is the Total Lung Capacity?

A

TLC - Vital Capacity + Residual Volume

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9
Q

What is the inspiratory Capacity?

A

IC - Tidal Volume + the inspiratory reserve volume

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10
Q

What is the Functional Residual Capacity?

A

FRC - Expiratory Reserve Volume + Residual Volume

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11
Q

What is the FEV1

A

Forced expired volume in 1 second

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12
Q

What is the FEV1:FVC?

A

Fraction of Forced Viral Capacity expired in 1 second

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13
Q

What is ventilation?

A

Movement of air in and out of the lungs

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14
Q

What is Pulmonary Ventilation?

A

Total movement of air in and out of the lungs

Measured in L/min

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15
Q

What is alveolar Ventilation?

A

Fresh air getting to the alveoli and therefore is available for gas exchange

Measured in L/min

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16
Q

What happens to ventilation in the sympathetic system?

A

Rapid breaths meaning less tidal volume and therefore less alveolar ventilation causing Hypo-ventilation

17
Q

What happens to ventilation in the parasympathetic system?

A

Slower breaths causing a greater tidal volume causing an increase in alveolar ventilation and therefore Hyper-ventilation

18
Q

What is Dalton’s Law?

A

Total Pressure of a gas mixture is the sum of the pressures of the individual gases

19
Q

What is the definition of Partial Pressure?

A

Pressure of gas in a mixture of gases is equivalent to the percentage of that particular gas in the entire mixture multiplied by the pressure of the whole gas mixture

Normally expressed in mmHg

20
Q

What happens to the partial pressure of O2 and CO2 when ventilation is normal?

A

They remain fairly constant

21
Q

What happens to Po2 and Pco2 during hyper-ventilation?

A

Po2 rises to 120mmhg

Pco2 falls to 20mmHg

22
Q

What happens to Po2 and Pco2 during hypo-ventilation?

A

Po2 falls to 30mmHg

Pco2 rises to 100mmHg

System 1: Respiratory AM (7 decks)

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