22. Most of the neurons in the human central nervous system are _______. (A) sensory neurons (B) motor neurons (C) interneurons (D) peripheral neurons

23. 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 on the muscles (C) its signals reach the muscles via the blood (D) it is connected to the internal neural network of the muscles

22. Most of the neurons in the human central nervous system are _______.
(A) sensory neurons
(B) motor neurons
(C) interneurons
(D) peripheral neurons

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