In External Respiration, the Partial Pressures Are

question 83

Multiple Choice

In external respiration, the partial pressures are:

• A)alveoli: high PO₂, low PCO₂; pulmonary capillaries: low PO₂, high PCO₂
• B)alveoli: high PO₂, high PCO₂; pulmonary capillaries: low PO₂, low PCO₂
• C)alveoli: low PO₂, high PCO₂; pulmonary capillaries: high PO₂, low PCO₂
• D)alveoli: low PO₂, low PCO₂; pulmonary capillaries: high PO₂, high PCO₂

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Definitions:

Venous Blood

Blood that is returning to the heart through the veins, characterized by a lower oxygen content and a darker color compared to arterial blood.

Arterial Blood

Oxygen-rich blood that is pumped from the heart to the rest of the body through arteries.

Intracellular Fluid

The fluid found inside cells, making up about 40% of the total body water in humans.

Plasma Concentration

The amount of a substance present in the plasma portion of blood.