Which transport mechanism causes the respiratory gases (O2, CO2) to move between the alveoli and pulmonary capillaries?
Osmosis
Active transport pump
Filtration
Diffusion
The Correct Answer is D
A. Osmosis: Osmosis refers to the movement of water across a membrane, not gases.
B. Active transport pump: Gas exchange does not require energy; it is a passive process, not active transport.
C. Filtration: Filtration is driven by hydrostatic pressure and is more relevant to kidneys and capillary exchange of fluids.
D. Diffusion: Diffusion is the passive movement of gases from an area of higher concentration to an area of lower concentration-how O₂ and CO₂ exchange occurs across the alveolar-capillary membrane.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Decrease oxygenation due to decrease in muscle function- kyphosis primarily affects skeletal structure, not muscles.
B. Decrease oxygenation due to inability to change thoracic pressure adequately- kyphosis alters thoracic cage shape, restricting expansion and limiting pressure changes required for ventilation.
C. Decrease oxygenation due to loss of elasticity of lung tissue- this relates more to normal aging or emphysema, not kyphosis.
D. Decrease in oxygenation due to decrease nervous system response- kyphosis doesn’t affect the nervous system directly.
Correct Answer is ["A","B","D"]
Explanation
A. Pharynx: The pharynx (throat) is part of the upper respiratory tract and functions as a passageway for both air and food.
B. Nasal cavity: The nasal cavity is the main entryway for inhaled air and is part of the upper respiratory system.
C. Bronchial tree: The bronchial tree is part of the lower respiratory system, beginning with the bronchi and branching into bronchioles.
D. Larynx: The larynx (voice box) is part of the upper respiratory system; it connects the pharynx to the trachea.
E. Trachea: The trachea (windpipe) is part of the lower respiratory system.
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