Nervous System Organization
This division includes the brain and spinal cord
What is the central nervous
This part of the neuron contains the nucleus
What is the cell body
This spinal cord function allows rapid response without brain involvement
What is a reflex
his type of matter is located in the center of the spinal cord
What is gray matter
This is a rapid automatic response
What is a reflex
Nerves outside the brain and spinal cord belong to this division
What is the peripheral nervous system
These structures receive incoming signals
What are dendrites
This occurs when sodium enters the cell
What is depolarization
his type of matter surrounds the gray matter
What is white matter
This is the pathway followed in a reflex
What is a reflex arc
his division carries information toward the CNS
What is the sensory or afferent division
This part carries impulses away from the cell body
What is the axon
This occurs when potassium leaves the cell
What is repolarization
There are this many pairs of spinal nerves
What is 31
What is a reflex arc
What is the somatic nervous system
This division carries commands away from the CNS
What is the motor or efferent division
These release neurotransmitters
What are axon terminals
This phase is when the membrane becomes more negative than resting
What is hyperpolarization
This plexus supplies the upper limbs
What is the brachial plexus
This division controls involuntary functions
What is the autonomic nervous system
hese are the two divisions of the motor system
What are somatic and autonomic
This structure speeds up impulse conduction
What is the myelin sheath
Damage to this structure slows or stops nerve conduction in diseases like multiple sclerosis
What is the myelin sheath
This plexus supplies the lower limbs
What is the lumbosacral plexus
This system is responsible for fight or flight
What is the sympathetic nervous system