Respiration Physiology

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These flashcards cover volume and capacity of respiration.

The volume air exhaled in quiet respiration

Resting tidal volume (TV)

The difference between the volume of air inhaled and the maximum volume that could be inhaled

Inspiratory reserve volume (IRV)

The difference between the volume of air exhaled and the maximum volume that could be exhaled

Expiratory reserve volume (ERV)

Air remaining in the lungs after a maximum exhalation

Residual volume (RV)

Never subject to gas exchange; in upper respiratory tract and conducting passageway

Dead air

Maximum volume of air that can be exhaled following maximum inhalation - volume available for life and speech

Vital capacity

The volume of air remaining in the body after a passive expiration

Functional residual capacity

All volumes (except dead air)

Total lung capacity

Tidal volume (TV) + inspiratory reserve volume (IRV) - maximum inspiration possible after tidal expiration

Inspiratory capacity

This volume is the difference between the volume of air exhaled and the maximum volume that could be exhaled.

Expiratory reserve volume

This is the portion of the respiratory cycle in which air is forced out of the lungs.

Expiration

This is the term for movement of air into and out of the lungs.

Respiration (ventilation)

This is the volume of air actually inspired and expired during a regular respiratory cycle.

Tidal volume

This is the volume of air remaining in the lungs after a maximum exhalation.

Residual volume

This volume is the difference between the volume of air inhaled and the maximum volume that could be inhaled.

Inspiratory reserve volume

This is the portion of the respiratory cycle in which air is sucked into the lungs.

Inspiration

This is the term for breathing when at rest.

Quiet respiration

This is the volume of air exhaled in quiet respiration.

Resting tidal volume

These are the three passive forces of expiration.

torque, elasticity, gravity

This instrument is used to measure respiratory pressures.

(U-tube) Manometer

This is the term for breathing with exertion, requiring muscular effort on expiration as well as on inspiration.

Forced respiration

This is the term for an amount of air inhaled, exhaled, or in the lungs

Volume

This instrument is used to measure respiratory volumes.

(Wet) spirometer

This is the volume of air remaining in the body after a passive expiration.

Functional residual capacity

This is the sum of all the volumes.

Total lung capacity

twisting, especially of chondral portion of ribs in inspiration; untorques for quiet expiration

Torque

recoil forces of lungs and rib cage to return structures to resting state

Elasticity

natural force to pull raised structures down to resting position

Gravity

Number of inspirations and expirations in a respiratory cycle

1 each

Average minute volume (the amount of air you breathe quietly in one minute)

6000 ml/6 liters

Total lung capacity

5100 ml

Vital capacity

4000 ml

Average breaths per minute (bpm) during quiet tidal breathing for adults

12-18 bpm

Average number of alveoli at birth

25 million

Average number of alveoli by 8 years

300 million

Average bpm taken by an infant

40-70 bpm

Age when process of alveolar development is nearly complete

8 years

Volume of air in inspiratory reserve volume (IRV) for an average adult

2500 ml

Volume of air in expiratory reserve volume (ERV) for an average adult

1000 cc or ml/1.0 liters

Volume of air in residual volume (RV) for an average adult

1100 cc or ml/1.1 liters

Average volume of air exchanged in one cycle of tidal breathing for an average adult

525 cc or ml

Dead air volume

150 cc or ml

Volume of air remaining in the lungs after each breath of tidal respiration

38% of vital capacity

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