The Muscle Fibers in a Muscle Spindle

Question

The muscle fibers in a muscle spindle
A) are not true muscle fibers because they cannot contract.
B) function to maintain tension on spindle stretch receptors.
C) are recruited only during very high force contractions.
D) are recruited only during very low force contraction.

Accepted Answer

Muscle spindle fibers, also known as intrafusal fibers, are specialized to detect changes in muscle length and tension. They help maintain tension on the spindle stretch receptors, allowing them to sense and respond to changes in muscle stretch.