nerve 1 Flashcards

1
Q

CNS / CENTRAL NERVOUS SYSTEM
- Composed of

A

Brain and Spinal Cord

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2
Q

PNS/ PERIPHERAL NERVOUS SYSTEM
- Composed of

A

Spinal Nerves and
Cranial Nerves

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3
Q

(labas) ends in brain

A

Sensory/Afferent

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4
Q

starts in brain and stops in muscle

A

Motor/Efferent

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5
Q

sense organ

A

Sensory Neuron

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6
Q

Skeletal Muscle

A

Somatic Motor Neuron

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7
Q
  • Basic unit of brain and spinal cord
A

NEURONS

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8
Q

Smooth Muscle and Cardiac Muscle Glands

A

Autonomic Motor Neuron

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8
Q

ANS/ AUTONOMIC NERVOUS SYSTEM
- Automatic
- Composed of

A

Sympathetic and
Parasympathetic

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8
Q
  • stress/emergency
  • Involuntary muscle, regulator, and
    glands
A

Sympathetic

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9
Q
  • resting phase
  • Glands: exocrine, sweat glands,
    sebaceous, prostate, and cervical.
A

Parasympathetic

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10
Q
  • Carries impulse towards the cell
    body
A

DENDRITE

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11
Q
  • Carries the impulse away from the
    cell body
A

AXON

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12
Q
  • Fasten or hazes the transfer of
    impulse
A

MYELIN SHEATH

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12
Q
  • Caused by lack of neuron
  • atrophy of the brain
  • Low neuron leads to dementia, which leads to BLANK leads to atrophy.
A

DEMENTIA and ALZHEIMER’S

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13
Q
  1. Neurons
  2. Neuroglia
A

TWO CELL TYPES

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14
Q
  • Largest and most numerous
  • Function: BBB, structural
    frameworks and repairs regulation of
    ions.
A

Astrocyte

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15
Q

is Low Na leads to
confusion

A

Hyponatremia

16
Q
  • Smaller than astrocyte
  • Produces myelin sheat in CNS
A

Oligodendrocyte

17
Q
  • Smallest
  • Phagocytosis of foreign bodies
  • High during infection and injury as a
    form of defense
A

Microglia

18
Q

infected meninges

A

Meningitis

19
Q

infected brain

A

Encephalitis

19
Q
  • Lining of ventricles and central cana
  • Some regions are ciliated (ex. Cilia
    in respiratory)
  • Some specialized to produce CSF
A

Ependymal Cell

19
Q
  • Responsible for myelin sheath
    together with oligodendrocyte.
  • Responsible for myelination, but
    surrounds all peripheral axons.
  • Involved in repair mechanism after
    injury- Wallerian Degeneration
A

SCHWANN CELLS

20
Q
  1. Anaxonic
  2. Unipolar
  3. Bipolar
  4. Multipolar
A

TYPES OF NEURON

21
Q
  • In CNS
  • No axon
A

ANAXONIC

22
Q
  • No dendrites
A

UNIPOLAR

23
Q
  • No myelin sheath
  • Rare
  • Is in SPECIAL SENSE
A

BIPOLAR

24
Q
  • Most common
  • all motor neuron
  • complete
A

MULTIPOLAR

24
Q

labas or outer

A

Somatic

25
Q

internal

A

Visceral

26
Q
  • Site of communication between two
    nerve cell or nerve cell and effector
    cell
  • Electrical and Chemical
A

SYNAPSE

26
Q
  • Found in heart (has own electrical
    current)
  • CNS
A

Electrical Synapse

26
Q
  • Most common
  • Signal via NT
A

Chemical Synapse

27
Q
  • Many to one
  • Several neurons synapse with a
    single neuron, concentrating the
    input
A

CONVERGENCE

28
Q

NEURON ORGANIZATION

A
  1. Convergence
  2. Serial Processing
  3. Parallel Processing
  4. Divergence
29
Q
  • Aka STEP WISE
  • Cannot multi task
  • Sequential (sequence)
A

SERIAL PROCESSING

29
Q
  • Simultaneous processing
A

PARALLEL PROCESSING

30
Q
  • One to many
  • One neuron synapse with several,
    effectively “spreading the word”
A

DIVERGENCE

30
Q
  • Collection of cell bodies
  • Center or the NUCLEUS of CNS
A

GANGLIA

31
Q
  • Bundles of axon
  • Called TRACTS in CNS and
    NERVES in PNS
A

NERVE

31
Q
  • Myelinated (both nerves and tracts)
A

White

32
Q
  • Non-myelinated material
  • Non myelinated axons CNS=
    Nucleus, in PNS= Ganglia
A

Gray