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Anatomy and Physiology of the Nervous System: Terms and Definitions, Quizzes of Physiology

Definitions for various terms related to the nervous system, including influx and efflux, nerve, action potential, white matter, grey matter, schwann cells, oligodendrocytes, myelin sheath, saltatory conduction, motor unit, ganglia, different lobes of the brain, medulla oblongata, number of cranial nerves, and spinal nerves.

Typology: Quizzes

2009/2010

Uploaded on 10/04/2010

samcrow
samcrow 🇺🇸

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TERM 1
influx
DEFINITION 1
coming in (sodium)
TERM 2
efflux (going out)
potassium
DEFINITION 2
Definition
TERM 3
nerve
DEFINITION 3
a collection of motor axons and sensory dendrites in PNS.
TERM 4
action potential
DEFINITION 4
an all or none electrical event in an axon or muscle fiber in
which the polarity of the membrane potential is rapidly
reversed and reestablished.
TERM 5
white matter
DEFINITION 5
White matter is one of the two components of the central
nervous system and consists mostly of myelinated axons.
This forms the region deep to the cerebral cortex in the brain
and the outer portion of the spinal cord.
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influx

coming in (sodium) TERM 2

efflux (going out)

potassium

DEFINITION 2 Definition TERM 3

nerve

DEFINITION 3 a collection of motor axons and sensory dendrites in PNS. TERM 4

action potential

DEFINITION 4 an all or none electrical event in an axon or muscle fiber in which the polarity of the membrane potential is rapidly reversed and reestablished. TERM 5

white matter

DEFINITION 5 White matter is one of the two components of the central nervous system and consists mostly of myelinated axons. This forms the region deep to the cerebral cortex in the brain and the outer portion of the spinal cord.

grey matter

Grey matter is a major component of the central nervous system, consisting of neuron cell bodies and dendrites but few myelinated axons. it forms the cortex of the cerebrum, cerebral nuclei, and the central region of the spinal cord TERM 7

schwann cells

DEFINITION 7 a supporting cell of the periphal nervous system that forms sheaths around periphial nerve fibers. schwann cells also direct regeneration of peripheral nervefibers to their target cells. TERM 8

oligodendro cytes

DEFINITION 8 a type of glia cell that forms myelin sheaths around axons in the centralnervous system. TERM 9

mylelin sheath

DEFINITION 9 a sheath surrounding axons formed from the cell membrane of schwann cells in the periphial nervous system and from oligiodycotes in the central nervous system TERM 10

saltatory

conduction

DEFINITION 10 the rapid passage of action potentials from one node of ranvier to another in myelinated axons

spinal nerves