nervous tissue Flashcards

1
Q

(Histology of the Nervous System)
Neuron

A

nerve cell
specialised for signal conduction
information proccessing

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2
Q

(Histology of the Nervous System)
neuroglia cell

A

support, nourish & protect neurons
neuroglia are critical for maintaining homeostasis of interstitial fluid around neurons

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3
Q

(Structure of a typical motor neuron)
cell body

A

nucleus, cytoplasm with typical organelles

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4
Q

(Structure of a typical motor neuron)
dendrites

A

highly branched structures emerging from cell body
receive input

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5
Q

(Structure of a typical motor neuron)
Axon

A

conducts impulse away from cell body toward another neuron or effector
emerges at cone-shaped axon hillock

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6
Q

(Structure of a typical motor neuron)
axon terminals

A

at end of axon with synaptic bulbs

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7
Q

(Myelination)
axons covered with a myelin sheath

A

many-layered lipid & protein creating insulations
increases speed of nerve conduction

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8
Q

(Myelination)
Nodes of Ranvier = gaps in the myelin

A

nodes are important for signal conduction

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9
Q

(Myelination)
name a disease that could destroy myelin

A

multiple sclerosis

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10
Q

what is white matter

A

primarily myelinated axon

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11
Q

what is grey matter

A

cell bodies
dendrites
unmyelinated axons
axon terminals
neuroglia

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12
Q

what is the brain cortex (outer layer)

A

made up of grey matter and white matter located internally

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13
Q

where is the spinal cord grey atter located?

A

centrally

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14
Q

where is white matter located?

A

externally

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15
Q

(neuroglia)
Astrocytes

A

blood-brain barrier

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16
Q

(neuroglia)
Oligodendrocytes

A

create myelin in CNS

17
Q

(neuroglia)
Microglia

A

defence

18
Q

(neuroglia)
Ependymal cells

A

produce cerebrospinal fluid

19
Q

(neuroglia)
Schwann cells

A

PNS cell support/myelin

20
Q

(neuroglia)
Satellite cells

A

in PNS ganglia