Nervous tissue

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1

Neuron

The basic functional unit of the nervous system.

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Major function of this cell type (Neuron)

to transmit & generate messages (nerve impulses from one another

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Name 4 types of neuroglia in the CNS & list the function for each of these cels

Astrocytes, ependymal, microglial , oligodendrocytes

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astrocytes

helps regulate the extra cellular composition of brain fluid.

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ependymal

secretes cerebrospinal fluids helps move CBF in brain & spinal cord.

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microglial

phagocytic cells in the CNS

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oligodendrocytes

form part of the myelin sheaths of axons w/in the CNS

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Schwann cells

the PNS glial cell the forms myelin
( looks like hot dog buns)

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afferent neuron

neuron that conducts impulse toward the CNS from the body periphery
(outside to the left towards the body -in)

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efferent neuron

neuron that conducts impulses away form the CNS to muscle & glands.
( inside to the right -the body- out)

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satellite cells

PNS glial cell that surrounds dorsal root ganglion neurons.

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ganglion

collection of nerve cell bodies found outside the CNS

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CNS
Central Nervous System

brain & spinal cord collectively

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interneuron

neuron serving as part of the conduction pathway between sensory & motor neurons ( middle)

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neuroglia

specialized supporting cells in the CNS

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neurotransmitters

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

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nerve

a bundle of nerve processes inside the CNS

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nuclei

neuron cell bodies are found in the CNS in clusters
(occasionally the reside in ganglia)

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Peripheral Nervous System PNS

The part of the nervous system that lies outside the centra nervous system consisting of nerves & ganglia.

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synapse

junction or point of close contact between neurons

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tract

ganglia &spinal & cranial nerves.

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axon

impulses generator & transmitter

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axon terminal

secretes neurotransmitter

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axon hillock

region of the cell body from which the axon originates

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dendrite

receptive region of a neuron

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myelin sheath

insulates the nerve fibers

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neurofibril

may be involved in the transport of substances w/in the neuron

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neuronal cell body

site of the nucleus and most important metabolic area

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NISSL BODIES

essential rough endoplasmic reticulum important metabolically

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What substances is found in synaptic vesicles of the axon terminal

neurotransmitter