Compared to When He Was a Young Man, Chris's Muscles

question 60

Multiple Choice

 Compared to when he was a young man, Chris's muscles ______ now that he has grown old.

• A) contain fibers that are more angular than round
• B) show a more even distribution of slow- and fast-twitch fibers
• C) are more likely to be hybrids of fast- and slow-twitch fibers
• D) are more likely to be made up of slow-twitch fibers