Which of the following terms doesn't mean one and the same ?

Options

A. Polygobulia - Polycythemia
B. Scavenger leucocyte - Monocyte
C. Bicuspid valve - Mitral valve
D. Myocardial infarction - Myocardial ischaemia

Answer

To solve the question "Which of the following terms doesn't mean one and the same?", we will analyze each option provided to determine if they are synonymous or not.

### Step-by-Step Solution:

1. **Understand the Terms**: We need to identify what each term in the options means and if they refer to the same concept.

2. **Analyze Option A: Polygobulia and Polysithemia**:
- **Polygobulia**: This term refers to an increased number of red blood cells.
- **Polysithemia**: This term is often used interchangeably with polygobulia and refers to an increase in the volume of red blood cells.
- **Conclusion**: These two terms are synonymous.

3. **Analyze Option B: Squanger and Monocyte**:
- **Squanger**: This term is not commonly used but seems to refer to cells that engulf pathogens (phagocytes).
- **Monocyte**: This is a type of white blood cell that can differentiate into macrophages and dendritic cells, which are phagocytic.
- **Conclusion**: While not a perfect match, monocytes can be considered squangers due to their phagocytic nature. This option is also synonymous in a broader sense.

4. **Analyze Option C: Bicuspid Valve and Mitral Valve**:
- **Bicuspid Valve**: This is a valve in the heart with two flaps.
- **Mitral Valve**: This is the same valve known as the bicuspid valve, located between the left atrium and left ventricle.
- **Conclusion**: These two terms are synonymous.

5. **Analyze Option D: Myocardial Infarction and Myocardial Ischemia**:
- **Myocardial Ischemia**: This condition occurs when blood flow to the heart muscle is reduced, preventing it from receiving enough oxygen.
- **Myocardial Infarction**: This is a heart attack, which occurs when blood flow to a part of the heart is blocked, causing tissue damage.
- **Conclusion**: These two terms are not synonymous. Myocardial ischemia can lead to myocardial infarction, but they describe different conditions.

### Final Answer:
The term that does not mean one and the same is **Option D: Myocardial Infarction and Myocardial Ischemia**.

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