major amount of oxygen in blood is transported in the form of

Options

A. Bicarbonate ions
B. oxyhaemoglobin
C. Dissolved form in plasma
D. carboxyhaemoglobin

Answer

To determine the major form in which oxygen is transported in the blood, we can analyze the options provided step by step.

### Step-by-Step Solution:

1. **Understanding Oxygen Transport in Blood**:
- Oxygen is essential for cellular respiration and is transported in the blood to various tissues in the body.

2. **Evaluating the Options**:
- **Option 1: Bicarbonate Ion**:
- Bicarbonate ions primarily transport carbon dioxide (CO2) in the blood, not oxygen. They are formed when CO2 reacts with water, leading to the formation of carbonic acid, which dissociates into bicarbonate and hydrogen ions. Thus, this option is not correct for oxygen transport.

- **Option 2: Oxyhemoglobin**:
- Oxyhemoglobin is formed when oxygen binds to hemoglobin in red blood cells. This complex is responsible for the red color of blood and is the primary means of oxygen transport in the bloodstream. This is the correct option.

- **Option 3: Dissolved Form in Plasma**:
- A small amount of oxygen is dissolved in plasma, but this form is not significant for the transport of oxygen. Most oxygen is carried by hemoglobin, making this option incorrect.

- **Option 4: Carboxyhemoglobin**:
- Carboxyhemoglobin is formed when carbon monoxide (CO) binds to hemoglobin, which reduces the hemoglobin's ability to carry oxygen. This is not a form of oxygen transport but rather a harmful condition, so this option is also incorrect.

3. **Conclusion**:
- After evaluating all the options, the major amount of oxygen in blood is transported in the form of **Oxyhemoglobin**.

### Final Answer:
The major amount of oxygen in blood is transported in the form of **Oxyhemoglobin**.

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