A nurse educator is explaining the term hyperplasia to a group of nursing students. Which statement, made by a nursing student, indicates an understanding of why hyperplasia occurs with myocardial infarction?
A) "The cells of the muscle experience hyperplasia with the prolonged need for oxygen."
B) "The cells of the heart are metaplastic in response to muscle damage."
C) "The cells of the heart muscle have lost fluid."
D) "The cells of the heart muscle are responding to metabolic needs."
Answer: A
Hyperplasia is an increase in density or number of normal cells in response to stress-in this case, the increased demand for oxygen. Cells that lose fluid will shrink in size. The cells of a person's heart do not enlarge as a metabolic response. Metaplasia is a change in the normal pattern of differentiation of cells.
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