Which process involves an increase in cell size in response to increased workload?

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

Answer: (B)

Hypertrophy is the process characterized by an increase in the size of individual cells, leading to an overall enlargement of an organ or tissue. This adaptive response typically occurs in response to increased workload or stress on the tissue. For example, muscle cells can undergo hypertrophy in response to weight training, as they adapt to handle the increased force required during exercise.

Unlike hypertrophy, atrophy refers to a decrease in size or wasting away of tissue, often due to disuse, malnutrition, or reduced blood flow. Hyperplasia involves an increase in the number of cells within a tissue, often seen in response to certain stimuli like hormonal changes or chronic irritation. Dysplasia, on the other hand, signifies a disorganized growth pattern that may indicate a precancerous condition. Each of these processes serves distinct roles in response to physiological conditions, but hypertrophy specifically pertains to cell size increase due to heightened functional demands.