Question

Muscle fibers do not increase in number but instead increase in ________.

color

size

material

strength

Answer 1

Size as in volume too either by increasing in length or by increasing in diameter!

Answer 2

Answer: Size

Explanation: Although muscle cells can change in size, new cells are not formed when muscles grow. Instead, structural proteins are added to muscle fibers in a process called hypertrophy, so cell diameter increases.