Using the provided diagram, identify the structure labeled as #7.
Trachea
Pharynx
Larynx
Alveoli
The Correct Answer is D
A. Trachea
The trachea, commonly known as the windpipe, connects the larynx to the bronchi and allows air passage to the lungs.
B. Pharynx
-upper respiratory tract structure, far from alveoli.
C. Larynx
-upper airway structure above the trachea.
D. Alveoli
-terminal structures where gas exchange occurs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Breathing muscles: diaphragm, intercostals- these are the primary muscles responsible for ventilation.
B. Respiratory gases: oxygen and carbon dioxide- these are the main gases exchanged during respiration.
C. Structures of the upper respiratory tract: nose, pharynx, larynx- these are part of the upper respiratory tract.
D. Structures of the bronchial tree: trachea, bronchi, bronchioles, alveoli- the trachea is part of the conducting zone but not part of the bronchial tree. The alveoli are part of the respiratory zone, not the bronchial tree.
Correct Answer is B
Explanation
A. Dissolved in plasma- only ~1.5% of oxygen is dissolved in plasma.
B. By hemoglobin- ~98.5% of oxygen binds to hemoglobin in red blood cells.
C. By bicarbonate- this primarily transports carbon dioxide, not oxygen.
D. By pulmonary surfactants- surfactant reduces surface tension in alveoli, not related to oxygen transport in blood.
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