Primary,annulospiral endings are found associated with
A)the nuclear bag fibers.
B)the extrafusal fibers.
C)the mossy fibers.
D)the basal nuclei.

Question

Quizplus · Accepted Answer

Primary, annulospiral endings are sensory receptors that wrap around the central part of the intrafusal fibers of the muscle spindle. The intrafusal fibers are composed of two types: nuclear bag fibers and nuclear chain fibers. Primary, annulospiral endings are found specifically associated with the nuclear bag fibers. Therefore, the correct choice is A) the nuclear bag fibers.

Primary,annulospiral Endings Are Found Associated with