Recordings of Extrafusal Muscle Tension and Accompanying Sensory Discharge from Muscle

Multiple Choice

Recordings of extrafusal muscle tension and accompanying sensory discharge from muscle spindles reveal that

A) stimulation of α motoneurons is required to elicit a response from fusiform γ efferents.
B) fusiform efferents respond when extrafusal muscle fibers are relaxed.
C) fusiform efferents respond only if extrafusal muscle fibers are stimulated.
D) intrafusal muscle fibers' work load is proportional to that of the extrafusal muscle fibers.
E) intrafusal muscle fibers exhibit either maximum tension or none at all, depending on the tension experienced by the extrafusal muscle fibers.