Multiple Choice
Which of the following statements is true of the oropharyngeal airway?
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1. Introduction to Anatomy & Physiology
Introduction to Organ Systems
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When the diaphragm contracts, the volume of the lungs:
A
remains unchanged
B
decreases
C
increases
D
becomes zero
Verified step by step guidance1
Understand the role of the diaphragm in respiration: The diaphragm is a dome-shaped muscle located below the lungs. Its contraction and relaxation are key to the mechanics of breathing.
When the diaphragm contracts, it moves downward and flattens. This increases the space in the thoracic cavity, which houses the lungs.
Apply Boyle's Law: Boyle's Law states that pressure and volume are inversely related in a closed system. As the volume of the thoracic cavity increases due to diaphragm contraction, the pressure inside the lungs decreases.
Recognize the effect of decreased pressure: The lower pressure inside the lungs compared to the external atmospheric pressure causes air to flow into the lungs, increasing their volume.
Conclude that the contraction of the diaphragm leads to an increase in lung volume, facilitating inhalation.
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