GMS 6474 EXAM REVIEW QUESTIONS
WITH ACCURATE SOLUTIONS 2026
▶ How many motor neurons are required to have an effect in the somatic
nervous system. Answer: 1 neuron, called alpha motor neuron
▶ What are the effectors of the somatic nervous system. Answer: Usually
skeletal muscles
▶ How many motor neurons are required to have an effect in the
autonomic nervous system. Answer: 2, pre and post
▶ Where do the motor neurons of the somatic nervous system originate.
Answer: Anterior spinal cord
▶ What neurotransmitter do somatic motor neurons release. Answer:
Acetylcholine
▶ Where do preganglionic motor neurons come from in the autonomic
nervous system. Answer: Spinal cord or brain stem
▶ Where in the spinal cord does the sympathetic nervous system originate.
Answer: T1-L2
Thoraco-lumbar outflow
▶ Where do parasympathetic nervous system preganglions originate.
Answer: Cranial nerves (3, 7, 9, and 10)
Sacral region of spinal cord
Altogether called cranio-sacral outflow
▶ Length of pre and post ganglions in sympathetic nervous system.
Answer: Pre: short
Post: long
WITH ACCURATE SOLUTIONS 2026
▶ How many motor neurons are required to have an effect in the somatic
nervous system. Answer: 1 neuron, called alpha motor neuron
▶ What are the effectors of the somatic nervous system. Answer: Usually
skeletal muscles
▶ How many motor neurons are required to have an effect in the
autonomic nervous system. Answer: 2, pre and post
▶ Where do the motor neurons of the somatic nervous system originate.
Answer: Anterior spinal cord
▶ What neurotransmitter do somatic motor neurons release. Answer:
Acetylcholine
▶ Where do preganglionic motor neurons come from in the autonomic
nervous system. Answer: Spinal cord or brain stem
▶ Where in the spinal cord does the sympathetic nervous system originate.
Answer: T1-L2
Thoraco-lumbar outflow
▶ Where do parasympathetic nervous system preganglions originate.
Answer: Cranial nerves (3, 7, 9, and 10)
Sacral region of spinal cord
Altogether called cranio-sacral outflow
▶ Length of pre and post ganglions in sympathetic nervous system.
Answer: Pre: short
Post: long
