The Motor (Somatic Nervous) System Can Alter the Activities of Its

Multiple Choice

The motor (somatic nervous) system can alter the activities of its targets, the skeletal muscle fibers, because ________.

A) it is electrically coupled by gap junctions to the muscles
B) its signals bind to receptor proteins at synapses on the muscles
C) its signals reach the muscles via the blood
D) its light pulses activate contraction in the muscles
E) it is connected to the internal neural network of the muscles