Which of the following statements regarding skeletal muscle is TRUE?
A. A given skeletal muscle fiber will contract if excitatory synaptic inputs sufficiently exceed inhibitory synaptic inputs on the motor neuron that innervates that fiber and the motor neuron fires an action potential.
B. A given skeletal muscle fiber will contract when excitatory nervous stimuli sufficiently exceed inhibitory nervous stimuli at the motor end plate.
C. Skeletal muscle fibers have pacemaker activity.
D. Skeletal muscle contraction is inhibited by inhibitory motor neurons that synapse onto skeletal muscle fibers.
E. Skeletal muscle fibers are joined together by gap junctions.
Answer: A
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