Question

A group of muscle fibers responsible for a specific movement is called
(1 point)
Responses

a motor unit.
a motor unit.

a striated group.
a striated group.

a fast-twitch unit.
a fast-twitch unit.

a slow-twitch unit.

Answer 1

a motor unit.

Answer 2

When a muscle fiber contracts as much as it can it is called the _________________.
(1 point)
Responses

maximum potential principle
maximum potential principle

contraction principle
contraction principle

muscular capacity principle
muscular capacity principle

all or none principle