Question

the partial pressure of carbon dioxide is 40 mmhg in all of the following blood vessel except
1. coronary artery
2.pulmonary vein
3. pulmonary artery
4.systemic artery​

Answer 1

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Explanation:

Introduction

Oxygenation of tissues is one of the most important processes that occur within the human body. Without proper oxygenation of tissues, metabolic processes cannot function efficiently, and cellular functions will falter. With such importance for the survival of an organism, it is understandable that the process of extracting oxygen from environmental air is tightly regulated physiologically. All gases follow chemical laws that when mixed, will each have a partial pressure equal to the hypothetical pressure when the same gas homogeneously occupies the same volume at the same temperature as the original mixture.

Function

The composition of environmental air is approximately 78% nitrogen, 21% oxygen, 1% argon, and trace percentages of carbon dioxide, neon, methane, helium, krypton, hydrogen, xenon, ozone, nitrogen dioxide, iodine, carbon monoxide, and ammonia. Therefore, at sea level where atmospheric pressure is known to be 760 mm Hg, the partial pressures of the various gases can be estimated to have partial pressures of approximately 593 mm Hg for nitrogen, 160 mm Hg for oxygen, and 7.6 mm Hg for argon. However, these partial pressures are not accurate reflections of the partial pressures available for diffusion within the alveoli of the lung. When air is inhaled through the upper airways, it is warmed and humidified by the pulmonary tract. The result of this process introduces the presence of significant levels of water vapor that then adjusts the partial pressures the other gases, including oxygen. It is not possible to collect gases directly from the alveoli. The alveolar gas equation is of great help in calculating and closely estimating the partial pressure of oxygen inside the alveoli.

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