Which of the following best describes atrophy?

• A. Increased tissue size
• B. Decreased muscle size
• C. Curvature of muscles
• D. Inflammation of tissue

Answer: (B)

Atrophy refers to a reduction in the size or mass of a tissue or organ. In the context of muscles, atrophy specifically describes the decrease in muscle size, often due to disuse, aging, malnutrition, or certain medical conditions. This reduction can lead to weakness and decreased functionality of the affected muscles.

The other options do not accurately define atrophy. Increased tissue size would indicate hypertrophy, where there’s an increase in the size of the tissue. Curvature of muscles may refer to conditions like scoliosis but does not describe atrophy. Inflammation of tissue, known as "itis" (for example, arthritis), represents a different process entirely, not related to size reduction. Understanding these distinctions is crucial for grasping the concept of atrophy within the broader context of muscle health and recovery.