Which statement about waste excretion is true according to the material?

Which statement about waste excretion is true according to the material?

• A. No cells excrete
• B. Some cells excrete
• C. All cells excrete
• D. Excretion occurs only in the excretory system

Answer: (C)

Waste removal happens in every living cell because metabolism constantly produces wastes that must be expelled to keep the cell functioning. Some wastes exit directly through the cell membrane, while others are moved out by cellular processes to be disposed of later. Since all cells generate waste, excretion is a universal cellular activity, not something limited to just a few cells. The body’s excretory system then handles collecting and eliminating these wastes from the organism as a whole, but recognizing that each cell contributes to excretion explains why the statement about all cells excreting is true. Other options miss this universal cellular role: no cells excrete ignores ongoing waste production, some cells excrete ignores the fact that all cells generate and need to remove waste, and excretion occurs only in the excretory system overlooks the cellular basis of waste removal.

Waste removal happens in every living cell because metabolism constantly produces wastes that must be expelled to keep the cell functioning. Some wastes exit directly through the cell membrane, while others are moved out by cellular processes to be disposed of later. Since all cells generate waste, excretion is a universal cellular activity, not something limited to just a few cells. The body’s excretory system then handles collecting and eliminating these wastes from the organism as a whole, but recognizing that each cell contributes to excretion explains why the statement about all cells excreting is true. Other options miss this universal cellular role: no cells excrete ignores ongoing waste production, some cells excrete ignores the fact that all cells generate and need to remove waste, and excretion occurs only in the excretory system overlooks the cellular basis of waste removal.