Find out partial pressure of `O_(2)` and `CO_(2)` in oxygenated blood.

Options

A. `PO_(2)` = 104 mmHg `PCO_(2)` = 40 mmHg
B. `PO_(2)` 159 mmHg `PCO_(2)` =0.3 mmHg
C. `PO_(2)`=40 mmHg `PCO_(2)`=45 mmhg
D. `PO_(2)`=95 mmHg `PCO_(2)`=40 mmHg

Answer

To find the partial pressure of \( O_2 \) and \( CO_2 \) in oxygenated blood, we can follow these steps:

### Step 1: Understand the Concept of Partial Pressure
Partial pressure refers to the pressure exerted by a single type of gas in a mixture of gases. In the context of blood, we are interested in the partial pressures of oxygen (\( O_2 \)) and carbon dioxide (\( CO_2 \)).

### Step 2: Identify the Conditions for Oxygenated Blood
Oxygenated blood is typically found in the arteries, where hemoglobin is bound to oxygen. This occurs after oxygen has been absorbed in the lungs.

### Step 3: Determine the Partial Pressure of \( O_2 \)
In oxygenated blood, the partial pressure of oxygen (\( O_2 \)) is generally around 95 mmHg. This value indicates a high concentration of oxygen in the blood, as it is being transported from the lungs to the tissues.

### Step 4: Determine the Partial Pressure of \( CO_2 \)
In contrast, the partial pressure of carbon dioxide (\( CO_2 \)) in oxygenated blood is approximately 40 mmHg. This lower value reflects the fact that carbon dioxide is being expelled from the blood into the lungs to be exhaled.

### Step 5: Summarize the Findings
Thus, in oxygenated blood:
- The partial pressure of \( O_2 \) is approximately **95 mmHg**.
- The partial pressure of \( CO_2 \) is approximately **40 mmHg**.

### Final Answer
- Partial pressure of \( O_2 \): **95 mmHg**
- Partial pressure of \( CO_2 \): **40 mmHg**

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