Hypertrophy refers to

• A. Excessive muscle strength. 
• B. Decrease in muscle growth. 
• C. Lack of muscle movement. 
• D. Excessive tissue or organ development. 

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the term 'hypertrophy' by breaking down its roots. 'Hyper-' means excessive or above normal, and '-trophy' relates to nourishment or growth.
2. Step 2: Recognize that hypertrophy refers to an increase in the size of cells, which leads to an enlargement of a tissue or organ.
3. Step 3: Differentiate hypertrophy from other terms such as 'atrophy' (decrease in size) and 'lack of movement' (which is unrelated to growth).
4. Step 4: Apply this understanding to muscle tissue, where hypertrophy means an increase in muscle size due to growth of individual muscle cells, not just strength or movement.
5. Step 5: Conclude that hypertrophy means excessive tissue or organ development, which aligns with the correct answer provided.