What describes an increase in the volume of a tissue through enlargement of its component cells?

• A. Dysplasia
• B. Atrophy
• C. Hypertrophy
• D. Metaplasia

Answer: (C)

The correct answer is hypertrophy, which refers to the physiological or pathological increase in the size of tissues or organs due to the enlargement of their existing cells. This process can occur in response to various stimuli, such as increased workload, hormonal signals, or stress. One classic example of hypertrophy is seen in skeletal muscle tissue, where muscle fibers enlarge in response to regular exercise or resistance training.

Understanding hypertrophy is essential in the context of tissue healing and adaptation, as it represents a compensatory mechanism that allows tissues to meet increased demands. In contrast, dysplasia refers to the abnormal development or growth of tissue and is often associated with a precursor to cancer. Atrophy, on the other hand, describes a decrease in the size of a tissue or organ, typically due to a reduction in cell size or number. Metaplasia involves the reversible transformation of one differentiated cell type to another, often in response to chronic irritation or inflammation. These distinctions are important in the study of pathophysiology, as they help in understanding how tissues respond to various physiological and pathological conditions.