Which statement best describes gamma motor neurons?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Enhance your knowledge of the Lower Motor Apparatus with our Test. Prepare with our comprehensive study materials, including flashcards and multiple-choice questions, each accompanied by detailed explanations and hints. Boost your readiness for the exam!

Multiple Choice

Which statement best describes gamma motor neurons?

Explanation:
Gamma motor neurons tune how sensitive the muscle spindle is to stretch. They innervate the contractile ends of intrafusal fibers inside the spindle, causing those fibers to contract and keep the spindle taut as the muscle changes length. This keeps the spindle responsive to even small stretches,so the sense of muscle length and the stretch reflex remain accurate. That’s why the correct statement is that they increase spindle sensitivity. They do not innervate the main force-producing extrafusal fibers (that’s the role of alpha motor neurons), they aren’t receptors for light touch, and they don’t regulate blood flow.

Gamma motor neurons tune how sensitive the muscle spindle is to stretch. They innervate the contractile ends of intrafusal fibers inside the spindle, causing those fibers to contract and keep the spindle taut as the muscle changes length. This keeps the spindle responsive to even small stretches,so the sense of muscle length and the stretch reflex remain accurate. That’s why the correct statement is that they increase spindle sensitivity. They do not innervate the main force-producing extrafusal fibers (that’s the role of alpha motor neurons), they aren’t receptors for light touch, and they don’t regulate blood flow.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy