Analysis of CC's blood suggested metabolic acidosis. In CC's case, which of the following processes are most likely the cause of the metabolic acidosis?

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**Q8: Analysis of CC’s blood suggested metabolic acidosis. In CC’s case, which of the following processes are most likely the cause of the metabolic acidosis?**

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Transcribed Image Text:**Q8: Analysis of CC’s blood suggested metabolic acidosis. In CC’s case, which of the following processes are most likely the cause of the metabolic acidosis?** There are no graphs or diagrams accompanying this text.
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**Ethanol Metabolism Pathways**

**Cytosol**

**A. Pathway 1:**
- Major pathway of ethanol metabolism in the liver.
- Ethanol (\( \text{CH}_3\text{CH}_2\text{OH} \)) is converted to acetaldehyde (\( \text{CH}_3\text{C}=O \)).
- This reaction is catalyzed by alcohol dehydrogenase (ADH).
- NAD\(^+\) is reduced to NADH, releasing a proton (H\(^+\)).

**B. Pathway 2:**
- Microsomal ethanol oxidizing system (MEOS).
- Ethanol is converted to acetaldehyde through the action of CYP2E1.
- NADPH is oxidized to NADP\(^+\), consuming oxygen (\( \text{O}_2 \)) and releasing water (\( 2\text{H}_2\text{O} \)).

**Mitochondrion**

- Acetaldehyde (\( \text{CH}_3\text{C}=O \)) is further oxidized to acetate (\( \text{CH}_3\text{C}=O\text{OH} \)) and water (\( \text{H}_2\text{O} \)).
- This reaction is catalyzed by aldehyde dehydrogenase (ALDH).
- NAD\(^+\) is reduced to NADH, releasing a proton (H\(^+\)).

**Key Point:**
- Excess alcohol consumption increases the NADH:NAD\(^+\) ratio in the cytosol of hepatocytes.

---
Transcribed Image Text:--- **Ethanol Metabolism Pathways** **Cytosol** **A. Pathway 1:** - Major pathway of ethanol metabolism in the liver. - Ethanol (\( \text{CH}_3\text{CH}_2\text{OH} \)) is converted to acetaldehyde (\( \text{CH}_3\text{C}=O \)). - This reaction is catalyzed by alcohol dehydrogenase (ADH). - NAD\(^+\) is reduced to NADH, releasing a proton (H\(^+\)). **B. Pathway 2:** - Microsomal ethanol oxidizing system (MEOS). - Ethanol is converted to acetaldehyde through the action of CYP2E1. - NADPH is oxidized to NADP\(^+\), consuming oxygen (\( \text{O}_2 \)) and releasing water (\( 2\text{H}_2\text{O} \)). **Mitochondrion** - Acetaldehyde (\( \text{CH}_3\text{C}=O \)) is further oxidized to acetate (\( \text{CH}_3\text{C}=O\text{OH} \)) and water (\( \text{H}_2\text{O} \)). - This reaction is catalyzed by aldehyde dehydrogenase (ALDH). - NAD\(^+\) is reduced to NADH, releasing a proton (H\(^+\)). **Key Point:** - Excess alcohol consumption increases the NADH:NAD\(^+\) ratio in the cytosol of hepatocytes. ---
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