Nervous System #1

26 terms by aleventhal 

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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

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