ANATOMY
LIMB VASCULATURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gas exchange occurs in the alveoli
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Significant adaptations to the pulmonary system may be achieved via training
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Half of resting tidal volume sits in anatomical dead space
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The FEV1/FEC ratio is an indicator of static lung volumes
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Pleural pressure is always less than alveolar pressure
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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: -Normally, the pressure within the pleural cavity is slightly less than the atmospheric pressure, which is known as negative pressure. When the pleural cavity is damaged or ruptured and the intrapleural pressure becomes greater than the atmospheric pressure, pneumothorax may ensue.
Detailed explanation-3: -Intraalveolar pressure is the pressure inside the alveoli of the lungs. Intrapleural pressure is the pressure within the pleural cavity.