Percentage of `O_2` & `CO_2` transported in a dissolved state through plasma respectively

Options

A. 3 and 7
B. 7 and 3
C. 20 and 7
D. 7 and 20

Answer

To solve the question regarding the percentage of O2 and CO2 transported in a dissolved state through plasma, we can break it down into the following steps:

### Step 1: Understand the Transport Mechanism of Oxygen (O2)
- Oxygen is primarily transported in the blood in two forms:
1. Dissolved in plasma
2. Bound to hemoglobin in red blood cells (RBCs).

- It is known that approximately 97% of O2 is transported bound to hemoglobin, while only about 3% is transported in a dissolved state through the plasma.

### Step 2: Understand the Transport Mechanism of Carbon Dioxide (CO2)
- Carbon dioxide is also transported in the blood in multiple forms:
1. Dissolved in plasma
2. As bicarbonate ions (HCO3-)
3. Bound to hemoglobin as carbamino compounds.

- It is known that about 7% of CO2 is transported in a dissolved state through the plasma.

### Step 3: Summarize the Findings
- From the information gathered:
- The percentage of O2 transported in a dissolved state through plasma is **3%**.
- The percentage of CO2 transported in a dissolved state through plasma is **7%**.

### Step 4: Identify the Correct Answer
- The question asks for the percentages of O2 and CO2 transported in a dissolved state through plasma respectively.
- Based on the findings, the answer is **3% for O2 and 7% for CO2**.

### Conclusion
- Therefore, the correct option is **3 and 7**.

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