A&P Final Mastering questions (Respiratory)

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Which of the following respiratory structures is more commonly known as the "throat"?
Esophagus
Trachea
Larynx
Pharynx

Pharynx

The _________________ is also known as the "guardian of the airways".
vestibular folds
glottis
epiglottis
larynx

epiglottis

Which parts of the respiratory system function as the main sites of gas exchange?
terminal bronchioles
trachea
primary bronchi
alveoli

alveoli

________, the difference between the intrapulmonary and intrapleural pressures, prevents the lungs from collapsing.
Atmospheric pressure
Intrapleural pressure
Intrapulmonary pressure
Transpulmonary pressure

Transpulmonary pressure

Quiet inspiration is ____________, and quiet expiration is ______________.
an active process; also an active process
a passive process; an active process
a passive process; also a passive process
an active process; a passive process

an active process; a passive process

Which of the following represents all of the processes involved in respiration in the correct order?
Pulmonary ventilation; External respiration; Transport of respiratory gases; Internal respiration
Pulmonary respiration; External ventilation; Internal ventilation; Transport of respiratory gases
External respiration; Internal respiration; Transport of respiratory gases
Pulmonary ventilation; External ventilation; Internal ventilation; Transport of respiratory gases

Pulmonary ventilation; External respiration; Transport of respiratory gases; Internal respiration

What is the driving force behind pulmonary ventilation?
air sac contraction
environmental stimuli
volume changes of the thoracic cavity
muscle contraction

volume changes of the thoracic cavity

Which of the following is NOT a physical factor that influences pulmonary ventilation?
alveolar surface tension
airway resistance
lung compliance
partial pressure of oxygen in the air

partial pressure of oxygen in the air

Unlike inspiration, expiration is a passive act because no muscular contractions are involved. Expiration, however, depends on two factors. Which of the choices below lists those two factors?
the expansion of respiratory muscles that were contracted during inspiration and the lack of surface tension on the alveolar wall
the recoil of elastic fibers that were stretched during inspiration and the inward pull of surface tension due to the film of alveolar fluid
the negative feedback of expansion fibers used during inspiration and the outward pull of surface tension due to surfactant
combined amount of CO2 in the blood and air in the alveoli

the recoil of elastic fibers that were stretched during inspiration and the inward pull of surface tension due to the film of alveolar fluid

Which of the choices below describes the forces that act to pull the lungs away from the thorax wall and thus collapse the lungs?
compliance and transpulmonary pressures
the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid
the natural tendency for the lungs to recoil and transpulmonary pressures
compliance and the surface tension of the alveolar fluid

the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid

The relationship between the pressure and volume of gases is given by ________.
Henry's law
Dalton's law
Boyle's law
Charles' law

Boyle's law

Which of the following is the primary factor in oxygen attachment to, or release from, hemoglobin?
partial pressure of oxygen
temperature
partial pressure of carbon dioxide
blood pH

partial pressure of oxygen

Which form of CO2 transport accounts for the least amount of CO2 transported in blood?
As bicarbonate ion in plasma
Chemically bound to hemoglobin
As carbon monoxide in plasma
Dissolved in plasma

Dissolved in plasma

What is the most powerful respiratory stimulant in a healthy person?
blood carbon dioxide level
oxygen needs of cells
blood oxygen level
blood pH

blood carbon dioxide level

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