Alcohol is mostly metabolised in

Options

A. Liver
B. Kidneys
C. All body cells
D. Riboflavin

Answer

**Step-by-Step Solution:**

1. **Understanding Alcohol Metabolism**: Alcohol is a substance that undergoes metabolism in the body, which is the process of breaking it down into simpler compounds.

2. **Identifying the Main Organ for Metabolism**: The primary organ responsible for the metabolism of alcohol is the liver. This is where the majority of alcohol processing occurs.

3. **Enzymatic Breakdown**: In the liver, alcohol is first converted into acetaldehyde by an enzyme known as alcoholic dehydrogenase. This is the first step in the metabolic pathway.

4. **Further Conversion**: The acetaldehyde produced is then further metabolized into acetate by another enzyme called aldehyde dehydrogenase. This step is crucial as acetaldehyde is toxic and needs to be converted quickly.

5. **Final Products**: The acetate is eventually converted into carbon dioxide and water, which can be easily eliminated from the body.

6. **Percentage of Metabolism**: It is important to note that approximately 90% of the alcohol that is absorbed into the bloodstream is metabolized in the liver.

7. **Eliminating Incorrect Options**:
- Kidneys are primarily involved in filtering blood and do not metabolize alcohol.
- All body cells do not metabolize alcohol; they may absorb it, but the primary metabolism occurs in the liver.
- Riboflavin is a vitamin (Vitamin B2) and is not involved in the metabolism of alcohol.

8. **Conclusion**: Based on the information gathered, the correct answer to the question "Alcohol is mostly metabolised in" is the liver.

**Final Answer**: The liver.

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