The Two Major Divisions of the Vertebrate Nervous System Are

Question

The two major divisions of the vertebrate nervous system are the ____.  
A) autonomic and peripheral systems
B) sympathetic and parasympathetic systems
C) cranial and spinal nerves
D) central and peripheral nervous systems
E) brain and spinal cord

Accepted Answer

The two major divisions of the vertebrate nervous system are the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which includes all the nerves outside of the CNS. Option A and B do not encompass all divisions of the nervous system, option C is only referencing nerves and not entire divisions, and option E is redundant as it references the CNS already mentioned in option D.