CNS & PNS
This part of the nervous system contains the brain and spinal cord.
The Central Nervous System (CNS)
These cells are considered the basic functional units of the nervous system.
Neurons
This neurotransmitter helps stimulate muscle contraction.
acetylcholine
Reflexes are controlled primarily by this structure rather than conscious thought.
spinal cord
This disease involves inflammation of the meninges.
meningitis
This division of the nervous system carries information between the CNS and the rest of the body.
The Peripheral Nervous System (PNS)
This portion of a neuron receives incoming signals.
Dendrites
This neurotransmitter is associated with mood regulation.
serotonin
This structure detects the stimulus in a reflex arc.
receptor
This autoimmune disorder destroys myelin.
Multiple Sclerosis
This nervous system division prepares the body for fight-or-flight.
The Sympathetic Nervous System
This long extension carries impulses away from the cell body.
Axon
This neurotransmitter is deficient in Parkinson's disease.
dopamine
This neuron carries information toward the CNS.
the sensory neuron
This disorder causes tremor, rigidity, and decreased dopamine.
Parkinson's disease
This nervous system division decreases heart rate and promotes digestion.
The Parasympathetic Nervous System
These cells produce myelin in the CNS.
Oligodendrocytes
This neurotransmitter increases alertness and stress responses.
norepinephrine
This neuron carries information away from the CNS.
the motor neuron
This disorder often causes sudden facial paralysis on one side.
Bell's palsy
A patient has increased heart rate, dilated pupils, and rapid breathing. Which division has been activated?
The Sympathetic Nervous System
What is the primary benefit of myelin
It speeds nerve impulse conduction.
These naturally occurring chemicals help reduce pain perception.
endorphins
Why are reflexes considered protective?
They produce a rapid response that helps prevent injury.
This neurological emergency commonly presents with facial droop, speech difficulty, and unilateral weakness.
stroke (CVA)