When there is a resistance to the movement produced by a given limb muscle,
A) gamma motor neurons are inhibited by higher brain centers.
B) there is a decrease in the amount of force generated by extrafusal muscle fibers.
C) the muscle involved in the movement immediately shortens when stimulated.
D) intrafusal fibers receive fewer action potentials from the gamma motor neurons.
E) muscle tone is increased and more motor units are recruited to the contraction.
Answer: E