pearson 2

What does Boyle's law state about pressure and volume at a constant temperature and a constant pressure?

Pressure increases when volume decreases.

What is the volume of air that remains in the lungs after a forced expiration?

Residual volume

Which of the following actions will occur in the lungs if intrapleural pressure equals or increases above atmospheric pressure?

Collapse

Air moves into the lungs when the intrapulmonary pressure, or pressure inside the lungs, is __________.

less than atmospheric pressure

Expiration occurs when the pressure inside the lungs is:

• greater than atmospheric pressure.

Which of the following actions is not classified as a nonrespiratory movement?

breathing

Which statement best describes tidal volume?

Tidal volume is the air exchanged during normal breathing.

Functional residual capacity

Total amount of air that normally remains in the lungs after a tidal expiration

vital capacity

Total amount of exchangeable air

total lung capacity

Total amount of exchangeable and non-exchangeable air

inspiratory capacity

Total amount of air that can be inspired

Which of the following factors does not determine pulmonary compliance?

Elasticity of elastic tissue in the lungs

A __________ is an instrument used to measure respiratory volumes.

spirometer

What determines the direction of gas movements in internal respiration?

Partial pressure gradient

Air moves out of the lungs when the intrapulmonary pressure, or pressure inside the lungs, is __________.

greater than atmospheric pressure

What pulmonary capacity can be measured when a person inhales as deeply as possible and then exhales as much as possible?

Vital capacity

Predict what happens to air movement when atmospheric pressure is 760 mm Hg, intrapulmonary pressure is 758 mm Hg, and intrapleural pressure is 754 mm Hg.

Inspiration

What reduces alveolar surface tension?

Surfactant

Which one of the following pressures is not a gradient that influences pulmonary ventilation?

Hydrostatic pressure

Vital capacity = __________.

tidal volume + inspiratory reserve volume + expiratory reserve volume

Why does carbon dioxide dissolve better in plasma than oxygen?

It has a higher solubility in water.

Which of the following factors does not determine pulmonary compliance?

Elasticity of elastic tissue in the lungs

Which law states that each gas in a mixture exerts its own pressure?

Dalton's law

Which one of the following pressures is not a gradient that influences pulmonary ventilation?

Hydrostatic pressure

What is (are) the main muscle(s) of pulmonary ventilation?

Diaphragm