Cell Injury · Pathology

A decrease in the size and number of organelles within a cell, leading to reduced tissue mass, is known as:

  1. Aplasia
  2. Hypoplasia
  3. Atrophy
  4. Involution
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Correct answer: Atrophy

Atrophy is the shrinkage in the size of the cell by loss of cell substance. When a sufficient number of cells are involved, the entire organ or tissue decreases in size, often as an adaptive response to decreased workload or loss of innervation.

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