Question

which of the following statements regarding muscle fiber types is true? individual performance differences cannot be attributed to the varying percentages of the muscle fiber types. the number of ft and st fibers does not vary from one individual to another. most skeletal muscles contain both ft and st fibers. the number of ft and st fibers varies from one muscle to another. both b and d. question 47 a group of fibers activated via the same nerve is termed a question 48 skeletal muscle is made up of numerous cylinder - shaped cells called

Explanation:

1. For the first question about muscle - fiber types:

• Individual performance can be related to muscle - fiber type percentages, so the first option is false.
• The number of fast - twitch (FT) and slow - twitch (ST) fibers varies between individuals and between different muscles. So the second option is false.
• Most skeletal muscles indeed contain both FT and ST fibers, which is correct.
• The number of FT and ST fibers does vary from one muscle to another, which is also correct.

1. For the second question: A group of fibers activated via the same nerve is called a motor unit.
2. The third question seems incomplete in the provided image, but skeletal muscle is made up of long, cylinder - shaped cells called muscle fibers or myofibers.

Answer:

1. C. Most skeletal muscles contain both FT and ST fibers; D. The number of FT and ST fibers varies from one muscle to another
2. Motor unit
3. Muscle fibers (or Myofibers)