Inhalation and exhalation are:
Due to contraction of the trapezius muscle
Referred to as ventilation (breathing)
Due to relaxation of the diaphragm and the intercostals muscles
Caused by contraction and relaxation of the bronchiolar smooth muscle
The Correct Answer is B
A. Due to contraction of the trapezius muscle: Not involved in normal breathing.
B. Referred to as ventilation (breathing): Correct; ventilation is the process of moving air in and out of the lungs.
C. Due to relaxation of the diaphragm and intercostal muscles: Only exhalation is passive due to relaxation.
D. Caused by contraction and relaxation of the bronchiolar smooth muscle: Regulates airflow, not breathing movements.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Inferior/lower left lobe: The left lung is on the viewer’s right. The lower lobe of the left lung is positioned inferiorly (near the diaphragm) and would be closer to label #8.
B. Middle lobe: The middle lobe is only present in the right lung and lies below the superior lobe but above the inferior lobe.
C. Superior/upper right lobe: Label #1 is at the top part of the right lung.
D. Superior/upper left lobe: The left lung has only two lobes: superior and inferior. The superior lobe of the left lung would be in the corresponding location to label #6.
Correct Answer is D
Explanation
A. Grapelike sacs located very close to pulmonary capillaries: This correctly describes the structure of alveoli.
B. Located within the lungs: Alveoli are indeed located in the lungs.
C. Primarily concerned with gas exchange: Alveoli are the main site of gas exchange in the lungs.
D. Contain smooth muscle: Alveoli do not contain smooth muscle; this is a feature of bronchi and bronchioles.
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