SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a 40 mm Hg
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b 45 mm Hg
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Either A or B
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None of the above
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Detailed explanation-1: -PO2 in tissues is low (40 mmHg) relative to arterial blood (100 mmHg). O2 moves into tissues, CO2 moves out of tissues, into blood.
Detailed explanation-2: -The partial pressure of carbon dioxide (PCO2) is the measure of carbon dioxide within arterial or venous blood. It often serves as a marker of sufficient alveolar ventilation within the lungs. Generally, under normal physiologic conditions, the value of PCO2 ranges between 35 to 45 mmHg, or 4.7 to 6.0 kPa.
Detailed explanation-3: -For example, at sea level with no additional supplemental oxygen and a normal physiological state, the PO2 inside the alveoli calculates at approximately 100 mm Hg. But, if a patient is given 100% oxygen in the same situation the PO2 can be as high as 663 mm Hg.
Detailed explanation-4: -Po2 in oxygenated blood (95 mm Hg)>Po2 in body cells (40 mmHg) and Pco2 in oxygenated blood is 40 mm Hg of <Pco2 in body cells (45 mm Hg) during exchange of gases between blood and tissue. Therefore, in systematic arteries, Po2 is 95 mm Hg and Pco2 is 40 mm Hg. Q.
Detailed explanation-5: -The pressure exerted by oxygen in a mixture in the alveoli of lungs is known as the partial pressure of oxygen. It is represented by pO2. Alveoli have a pO2 of 104 mm Hg.