Alpha motoneurons innervate A. nuclear chain fibers. B. nuclear bag fibers. C. e

Question

Alpha motoneurons innervate A. nuclear chain fibers. B. nuclear bag fibers. C. extrafusal fibers. D. intrafusal fibers. The stretch reflex is enhanced in response to activation of A. the Golgi tendon organ. B. alpha motoneurons. C. gamma motoneurons. D. lower motoneurons. Coactivation of alpha and gamma motoneurons is stimulated by _____ neurons. A. upper motor B. lower motor C. intermotor D. sensory The _____ reflex prevents excessive muscle contraction. A. flexor B. cross-extensor C. Golgi tendon D. muscle spindle of the Golgi tendon organ normally

Explanation / Answer

Question: 2. Alpha motoneurons innervate _.

Answer: C. Extrafusal fibers

Alpha motoneurons innervate extrafusal muscle fibers of skeletal muscle.

Question: 3.The stretch reflex is enhanced in response to activation of _.

Answer: C.gamma motoneurons

Question: 4. Coactivation of alpha and gamma motoneurons is stimulated by ______________ neurons.

Answer: A. upper motor

Question: 5.The ______________ reflex prevents excessive muscle contraction.

Answer: C.Golgi tendon

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