Reversible and Irreversible Cell Injury · Pathology

Carbon tetrachloride (CCl4) induces liver cell injury primarily through which mechanism?

  1. Conversion to a free radical
  2. Inhibition of the sodium pump
  3. Direct binding to DNA
  4. Inhibition of protein synthesis
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Correct answer: Conversion to a free radical

CCl4 is converted by cytochrome P-450 in the liver into the highly reactive free radical CCl3*. This radical initiates lipid peroxidation, leading to rapid destruction of the endoplasmic reticulum and cell death.

Difficulty: Medium Question 18 of 20

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