24 terms

Nervous System

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Ganglia
Nerve cell cluster; group of nerve cell bodies
Axon
Long slender projection of a nerve cell
Central Nervous System
Brain and spinal cord
Peripheral Nervous System
Cranial and peripheral nerves (everything other than brain and spinal cord)
Regeneration
Process of renewal, restoration and growth
White Matter
Contains axons that are surrounded by myelin
Grey Matter
Darker areas of the brain and spinal cord consisting mainly of nerve cell bodies
Reflex Arc
The nerve pathway involved in a reflex...The pathway is this stimulus, sensory neuron, dorsal root of spinal cord, motor neuron, and effector organ
Neurotransmitter
Chemical transmitters that help nerve impulses move through a synapse
Sensory Receptors
A sensory receptor that will respond to a stimulus
Stimulus
Something that causes a reaction
Somatic Nervous System
Part of the nervous system that controls voluntary movements like skeletal muscles
Autonomic Nervous System
Part of the nervous system that controls involuntary movements like heart rate, heart beat, respirations, digestion, and smooth muscle
Action Potential
Nerve Impulse
Synapse
Permits a neuron to pass an electrical signal from one neuron to another
Sympathetic Nervous System
A major division of the autonomic nervous system that controls the "fight or flight" response, increased blood pressure and heart rate, decreased digestion, and dilation of pupils.
Parasympathetic Nervous System
A major division of the autonomic nervous system that controls rest and relaxation
Afferent Neuron
Another name for a sensory neuron
Efferent Neuron
Another name for a motor neuron
Synaptic Vesicle
Store and release neurotransmitters at a synapse.
Acetylcholine
Neurotransmitter that helps in muscle contraction
Dopamine
Neurotransmitter that gives the sensation of pleasure "natural high"
Serotonin
Neurotransmitter that functions in mood
Neuromuscular Junction
Where nervous system and muscular system meet
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