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Neuro > Histology > Flashcards

Histology Flashcards

1
Q

Cells of the CNS

A 
Neurons
Oligodendroglia
Astrocytes
Microglia
Ependymal Cells
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2
Q

Classification of Neurons

A

Bipolar
Pseudounipolar
Multipolar

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3
Q

Cerebral Organization (Outside to in)

A 
Molecular
External Granular
External Pyramidal
Internal Granular
Internal Pyramidal
Multiform
White
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4
Q

Cerebellar (Cerebrum) Organization

A

Molecular
Purkinje
Granular (all gray up to this point)
White

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5
Q

Blood Brain Barrier

A

Tight Junctions
Basal Lamina
End Feet (Astrocytes)

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6
Q

Oligodendrocytes

A

Schwann cells of CNS
1 cell will myelinate multiple axons
No basal lamina
No CT

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7
Q

Astrocyte End Feet

A

BBB
Node in CNS
Inner Surface of Pia matter

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8
Q

Microglial Cells

A

Macrophages of CNS, enter from blood

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9
Q

Choroid Plexus

A

Ependyma wrapped around fenestrated blood vessels

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10
Q

Choroid Epithelium

A

Cuboidal cells w/ tight junctions and apical microvilli

Produce CSF

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11
Q

Ependyma

A

Tanycytes

Ependymal cells

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12
Q

Ependymal Cells

A

Cilia, microvilli, and desmosomes

MITOCHONDRIA

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13
Q

Tanycytes

A

Found in third ventricle

Attached to each other and ependymal cells by tight junctions

Basal processes extend through astrocytic end feet to form own end feet on blood vessel

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14
Q

Central Canal Lining

A

Ependymal cells (no tanycytes)

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15
Q

Arachnoid-CSF Barrier

A

Prevents CSF from entering subdural space (potential space in CNS)

CSF drains through arachnoid villi

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16
Q

Blood-CSF Barrier

A

Allows passage of ultrafiltrate of plasma

CSF produced by choroid plexus

17
Q

Arachnoid villi

A

Protrusions of arachnoid into the lumen of venous sinus

How CSF is reabsorbed into the blood

18
Q

Hydrocephalus

A

Blockage of movement of CSF –> accumulation in ventricles and around brain

19
Q

where are nissl bodies not located

A

axon hillock

20
Q

bipolar neuron defintion and what it does

A 
Single axon emerges from either side of cell body 
Sensory structures 
-Retina 
-Olfactory epithelium 
-Vestibular  
-Auditory system
21
Q

Pseudounipolar neuron definition and what it does/examples

A

Single axon divides a short distance from cell body
Two branches: Peripheral branch-Carries info from periphery
Central branch-Ends in spinal cord
Examples :Sensory ganglia of cranial and spinal nerves

22
Q

Multipolar neuron definition and examples

A

Many dendrites and a single long axons emerge from cell body
Examples:Pyramidal cell-of cerebral cortex
Purkinje cell of cerebellar cortex

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