ANATOMY
LIMB VASCULATURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pleural pressure drops during inhalation due to increase in thoracic cavity volume.
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true
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false
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Due to the adhesive force of the pleural fluid, the expansion of the thoracic cavity forces the lungs to stretch and expand as well. This increase in volume leads to a decrease in intra-alveolar pressure, creating a pressure lower than atmospheric pressure.
Detailed explanation-2: -During inhalation, volume increases as a result of contraction of the diaphragm, and pressure decreases (according to Boyle’s Law). This decrease of pressure in the thoracic cavity relative to the environment makes the cavity less than the atmosphere (Figure 2a).
Detailed explanation-3: -Pleural pressure increases during inspiration in the zone of apposition of diaphragm to rib cage.
There is 1 question to complete.