Motor neurons alter skeletal muscle activities by releasing neurotransmitter because
A) they are electrically coupled by gap junctions to the muscles.
B) their signals bind to receptor proteins on the muscles.
C) their signals reach the muscles via the blood.
D) their light pulses activate contraction in the muscles.
E) they are connected to the internal neural network of the muscles.

Question

Quizplus · Accepted Answer

Motor neurons release neurotransmitters at the neuromuscular junction, where they bind to receptor proteins on the muscle fibers. This binding then initiates a cascade of events that leads to muscle contraction. There is no electrical coupling involved, the signals do not reach the muscles via the blood, and there are no light pulses involved. There is also no internal neural network in the muscles that the motor neurons are connected to.

Motor Neurons Alter Skeletal Muscle Activities by Releasing Neurotransmitter Because