試題詳解

23. Which of the following statements regarding skeletal muscle is TRUE?
(A) Skeletal muscle fibers have pacemaker activity.
(B) Skeletal muscle fibers are joined together by gap junctions.
(C) A given skeletal muscle fiber will contract when excitatory nervous stimuli sufficiently exceed inhibitory nervous stimuli at the motor end plate.
(D) 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