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26 terms

Nervous System #1

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Axon
conducts nerve impulses away from cell body
Astrocyte
neuroglial cell; found between nerve tissues and blood vessels, provide structural support, remove cellular debris, form blood/brain barrier
Afferent
carry nerve impulse from body to brain or spinal cord (sensory)
Arachnoid
middle layer of meninges; contains cerebrospinal fluid
Autonomic
efferent nerve; cannot be consciously controlled
Central (CNS)
nervous system containing the brain and spinal cord
Cerebrospinal fluid
liquid found in ventricles of brain, between arachnoid and pia mater
dura mater
outer most layer of meninges
efferent
go from the brain or spinal cord to a muscle or gland (motor)
interneurons
lie in the brain or spinal cord (association nerve)
Ions
charged particles, either negative or positive
Meninges
membranes that cover the brain and spinal cord
microglia
neuroglial cell; found in CNS, support neurons and carry on phagocytosis
myelin
lipid-protein substance (white in color)
neurotransmitter
chemical released from an axon that starts or stops a nerve impulse
oligodendrocytes
neuroglial cell; found along nerve fibers, form myelin within brain and spinal cord, found in CNS
Peripheral (PNS)
nervous system containing all nerves coming off of the spinal cord
Pia mater
inner layer of meninges
polarization
resulting from unequal distribution of ions
reflex arc
simplest nerve pathway; does not go to the brain
somatic
efferent nerve; under conscious control
synapse
a junction where information is transmitted from one neuron to the next
Frontal
division of brain for thinking, personality, voluntary movements, intelligence, memory, speech
parietal
division of brain for any sensations
temporal
division of brain for hearing and smell
occipital
division of brain for vision