Muscles make up more than _____ of a person's body mass.

• A. 40%
• B. 25%
• C. 10%
• D. 75%

Answer: (A)

Verified step by step guidance

1. Understand the question: The problem is asking about the approximate percentage of a person's body mass that is made up of muscles. This is a general biology concept related to human anatomy and physiology.
2. Recall the relevant concept: Muscles are a significant component of the human body, contributing to movement, posture, and other functions. On average, muscles make up a substantial portion of body mass in healthy adults.
3. Eliminate unlikely options: Consider the given choices (40%, 25%, 10%, 75%). A value like 10% is too low, as muscles are a major tissue type. Similarly, 75% is too high, as other tissues like bones, fat, and organs also contribute to body mass.
4. Focus on the most reasonable options: Between 40% and 25%, recall that muscles typically make up around 40% of body mass in an average adult. This value can vary slightly depending on factors like age, sex, and fitness level.
5. Select the correct answer: Based on the reasoning above, the most accurate choice is 40%.