Question

105. Which of the following is true with regards to estimates of muscle fibre number in human experiments?

1. Muscle fibre number can be estimated by MRI scans of muscle cross-sectional area and biopsy measurements of average muscle fibre cross-sectional area
2. Body builders have a higher estimated muscle fiber number compared to untrained individuals
3. A group of untrained individuals had an increase in muscle fiber number after a 12-week training program
4. All of the above

Answer 1

• A muscle fibre can be estimated for its composition using the MRI scans and biopsy measurement of average muscle fibre cross sectional area.
• In Body builders muscle number is higher as compared to untrained individual ,this is due to resistance training ofmuscle causing hypertrophy and hyperplasia of skeletal muscles.
• After training of 12 weeks resistance training individual can gain the increase in muscle fibre along with proper Diet .

Thus All of the above statements are correct