APoE Quiz 3

"Both type II fibers and type II motor units tend to be larger compared to type I fibers and motor units. For a very heavy lifting task, type IIx fibers are recruited first because they are most appropriate for the job. "

"Statement 1 is true, statement 2 is false"

The process of muscle contraction involves which ion?

Ca2+

Which contractile result will produce the most force due to rate coding?

Tetanus

"Thick filaments are anchored to the Z-disk, while thin filaments are anchored to the M-line. Ca2+ is gathered back into storage at the end of a contraction by passive mechanisms, which require no ATP. "

Both statements are false

Thin filaments are often named for which protein?

Actin

A protein that allows the muscle to function as if it has an internal spring is

Titin

"If you change your training mode from aerobic endurance training to resistance training, you can dramatically influence the ratio of type I to type II fibers in your muscles. Genetic factors appear to be most influential in determining the percentage of type I versus type II fibers. "

"Statement 1 is false, statement 2 is true"

Tendons connect _______ to ________.

"muscle, bones "

Thick filaments are primarily made of which protein?

Myosin

Type II fibers

Have more fibers per motor unit