Select the inappropriate pair.

Options

A. Chemosensitive area for respiration - Pons
B. GFR - 125 mL/min
C. Eustachian tube - Middle ear
D. Corpora quadrigemina - Midbrain

Answer

To solve the question of selecting the inappropriate pair, we will analyze each of the provided pairs one by one.

1. **Chemosensitive Area for Respiration**:
- The chemosensitive area responsible for respiration is located in the **medulla oblongata**. This area detects changes in carbon dioxide and oxygen levels in the blood and regulates the breathing rate accordingly.
- The pair states that it is matched with **PONS**, which is incorrect. The PONS is involved in regulating sleep and the sleep-wake cycle, not directly in respiration.

2. **GFR (Glomerular Filtration Rate)**:
- GFR is the rate at which blood is filtered in the kidneys, specifically in the glomeruli. The normal GFR is approximately **120 to 125 ml per minute**. This pair appears to be correct.

3. **Eustachian Tube**:
- The Eustachian tube connects the middle ear to the nasopharynx and helps in equalizing air pressure on both sides of the eardrum. This description is accurate, so this pair is also correct.

4. **Corporacordygemina**:
- The corpora quadrigemina is part of the midbrain and is involved in visual and auditory reflexes. It consists of two pairs of structures: the superior colliculi (visual reflexes) and the inferior colliculi (auditory reflexes). This pair is also correct.

After analyzing all pairs, we conclude that the inappropriate pair is:

**Chemosensitive Area for Respiration - PONS** (it should be Medulla Oblongata).

### Final Answer:
The inappropriate pair is: **Chemosensitive Area for Respiration - PONS**.

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