Smooth endoplasmic reticulum is especially abundant in liver cells because it is the site of
- A. detoxification of drugs and poisons
- B. synthesis of proteins for export
- C. production of most of the cell's ATP
- D. digestion of worn out organelles
Explanation
The smooth ER carries the enzymes that break down drugs, alcohol and metabolic poisons, which is why liver cells are rich in it. Protein export depends on rough ER, ATP on mitochondria, and digestion of organelles on lysosomes.
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