Anatomy lab exercise 11: Nervous tissue

20 terms by dldavisII 

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central nervous system

the brain and spinal cord collectively

neuroglia

specialized supporting cells in the CNS

synapse

junction or point of close contact between neurons

tract

a bundle of nerve processes inside the CNS

association neurons

neuron serving as part of the conduction pathways between the sensory and motor neurons

peripheral nervous system

ganglia and spinal and cranial nerves

ganglion

collection of nerve cell bodies found outside the CNS

efferent neuron

neuron that conducts impulses away from the CNS to muscles and glands

afferent neuron

neuron that conducts impulses toward the CNS from the body periphery

neurotransmitters

chemicals released by neurons that stimulate or inhibit other neurons or effectors

axon hillock

region of the cell body from which the axon originates

axon terminal

secretes neurotransmitters

dendrite

receptive region of a neuron

myelin sheath

insulates the nerve fibers

neuronal cell body

site of the nucleus and is the most important metabolic area

neurofibril

may be involved in the transport of substances within the neuron

Nissl bodies

essentially rough endoplasmic reticulum, important metabolically

endonerium

each fiber is surrounded by a delicate connective tissue sheath which insulates it from the other neuron processes adjacent to it; additional sheath that surrounds the myelin sheath

perinerium

groups of fibers bound by a coarse connective tissue to form bundles of fibers called fascicles

epinerium

all the fascicles bound together by a white, fibrous connective tissue sheath forming the cordlike nerve

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