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Question
A person sitting at rest experiences a temporary cessation of breathing after forced deep breathing for a few minutes. This is due to
A person sitting at rest experiences a temporary cessation of breathing after forced deep breathing for a few minutes. This is due to
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Solution
The correct option is D Both high O2 and very little CO2 in the blood
Breathing is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide. The breathing consists of repetitive cycles of inhalation and exhalation through airways which lead from nose to the alveoli.The composition of air in the atmosphere and in the alveoli differ. Alveolar air contains a greater amount of carbon dioxide and less oxygen than atmospheric air. This is because gas exchange removes oxygen from and adds carbon dioxide to the alveolar air. Both deep and forced breathing cause alveolar air composition to be changed more rapidly than during quiet breathing. As a result of this the partial pressures of oxygen and carbon dioxide change, affecting the diffusion process that moves gases across the membrane. This will cause oxygen to enter and carbon dioxide to leave the blood more quickly, thus there will be high oxygen and very little carbon dioxide in the blood.Thus, the correct answer is option D.
Breathing is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide. The breathing consists of repetitive cycles of inhalation and exhalation through airways which lead from nose to the alveoli.
The composition of air in the atmosphere and in the alveoli differ. Alveolar air contains a greater amount of carbon dioxide and less oxygen than atmospheric air. This is because gas exchange removes oxygen from and adds carbon dioxide to the alveolar air. Both deep and forced breathing cause alveolar air composition to be changed more rapidly than during quiet breathing. As a result of this the partial pressures of oxygen and carbon dioxide change, affecting the diffusion process that moves gases across the membrane. This will cause oxygen to enter and carbon dioxide to leave the blood more quickly, thus there will be high oxygen and very little carbon dioxide in the blood.
Thus, the correct answer is option D.
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