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Exam 3 A&P > Nervous System Part 1 > Flashcards

Nervous System Part 1 Flashcards

1
Q

Peripheral nervous system (PNS)

A

Nurse extend to outline or peripheral parts of the body

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2
Q

Autonomic nervous system

A

Consists of structures that regulate the bodies automatic or involuntary functions. A subdivision of the peripheral nervous system

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3
Q

What do neurons do

A

Conduct impulses

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4
Q

What do glia do

A

Support neurons

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5
Q

Three main parts of a neuron

A

The cell body, dendrites, and axon

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6
Q

Three types of neurons

A

Sensory neuron’s, motor neurons, interneurons

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7
Q

Sensory neuron’s are also called what

A

Afferent neurons

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8
Q

Motor neuron’s are also called what

A

Efferent neurons

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9
Q

What is an efferent neuron?

A

They transmit impulses in the opposite direction, away from the brain and spinal cord

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10
Q

What is a motor neuron

A

They transmit impulses in the opposite direction, away from the brain and spinal cord

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11
Q

What is a sensory neuron

A

They transmit impulses to the spinal cord and brain from all parts of the body body

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12
Q

What is an afferent neuron

A

Transmit impulses to the spinal cord and brain from all parts of the body

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13
Q

What is an interneuron

A

Conduct impulses from sensory neuron’s to motor neuron’s

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14
Q

Myelin

A

A white, fatty substance formed by Schwann cells the wraparound some axons outside the central nervous system

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15
Q

What is the axon surrounded by

A

Myelin

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16
Q

Myelinated fibers

A

Wraparound some axons outside the central nervous system

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17
Q

Nodes of Ranvier

A

Our intentions between adjacent Schwan cells.

18
Q

Neurilemma

A

The outer cell membrane of a Schwann cell

19
Q

Function of Glia cells

A

To hold the functioning neurons together and protect them

20
Q

Glioma

A

One of the most common types of brain tumors that develop from Glia

21
Q

Astrocytes

A

Glia cells with thread like branches that attach to neuron’s into small blood vessel’s and hold the structures close to each other

22
Q

Blood brain barrier (BBB)

A

A two layer structure formed by astrocyte branches. It separates the blood tissue and nervous tissue to protect vital brain tissue from harmful chemicals that might be in the blood

23
Q

Microglia

A

Glia cells that are smaller than astrocytes. They usually remain stationary, but inflamed or degenerating brain tissue, they and large, move about, and act as microbe eating scavengers.

24
Q

Oligodendrocytes

A

Help to hold nerve fibers together and also serve another and probably more important function; they produce the fatty myelin sheath that enevelips nerve fibers located in the brain and spinal cord. (Gli cell)

25
Q

Schwan cells

A

Are glial cells that also for myelin sheaths but do so only in the peripheral nervous system

26
Q

Nerve

A

A group of peripheral nerve fibers bundle together like the strands of a cable

27
Q

Tracts

A

Made up of bundles of axons in the CNS

28
Q

White matter

A

Bundles of axons in the CNS, tracts, are myelinated in this form white matter

29
Q

Gray matter

A

Brain and cord tissue composed of cell bodies and unmyelinated axons and dendrites

30
Q

Endoneurium

A

A thin wrapping of fibrous connective tissue you that surrounds each Exxon in a nerve

31
Q

Groups of Endoneurium wrapped axons

A

Fascicles

32
Q

Perineurium

A

A thin fibrous tissue surrounding each fascicle

33
Q

Epineurium

A

A tough fibrous sheet that covers the whole nerve

34
Q

Action potential

A

Nerve impulse

35
Q

Reflex arc

A

A basic type of neuron pathway

36
Q

Receptors

A

Are at the beginnings of dendrites of sensory neuron’s

37
Q

Ganglion

A

A group of nerve cell bodies located in the peripheral nervous system

38
Q

Synapse

A

A microscopic space that separates the axon endings of one year on from the dendrites of another

39
Q

Effector

A

And organ that puts nerve signals into effect

40
Q

Reflex

A

The response to impulse conduction over a reflex arc

41
Q

With drawl will reflex

A

A three neuron arc

42
Q

Central Nervous System (CNS)

A

The brain and spinal cord

Exam 3 A&P (23 decks)

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