pulmonary pt 3

inspiratory reserve Volume (IRV)

Additional amount of air (above tidal volume) that can be inhaled after a normal inspiration

Expiratory reserve volume (ERV)

the additional amount of air (above tidal volume) that can be expired from the lungs after a normal expiration

Residual volume

the amount of air that remains in the lungs after fully exhaling

tidal volume

the lung volume representing the normal volume of air displaced between normal inhalation and exhalation when extra effort is not applied

total lung capacity

maximum amount of air that can fill the lungs (TLC = Vt + ERV + IRV + RV

Inspiratory capacity

the volume of air that can be inspired following a normal, quiet expiration (IC = Vt + IRV)

Functional residual capacity

volume of air present in the lungs at the end of passive expiration

Vital capacity

the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath

0.5 L (or 500 ml)

What is a typical tidal volume for a young adult male?

6 L (or 6000 ml)

What is a typical total lung capacity for a young adult male?

highest

this graph shows that resistance is the _______________ at the 4th generation

decreases

This graph shows that after the 4th generation, resistance ________________ as the branching of the generations continues

Alveoli

Smallest functional unit of the respiratory system, where gas exchange occurs

respiratory bronchioles, alveolar ducts, alveoli

The respiratory zone includes...

External respiration

The exchange of gases in the lungs

internal respiration

The exchange of gases in body tissues.

Physical, alveolar

Both types of respiration (internal and external) are influenced by:

• _____________ properties of gases

• Composition of ______________ gas

Flow down gradient

Gases (e.g., O2, CO2) move by diffusion along their partial pressure gradients until equilibrium is reached

What core concept is this?

Dalton's Law

each gas in a mixture of gases exerts a partial pressure that is proportional to its concentration.

- the sum of partial pressures = total pressure

Dalton's Law

What is this image illustrating?