Nervous Tissue Flashcards

1
Q

what is basic nerve cell of nervous system

A

neuron

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2
Q

what is the function of a neuron

A

transmit signal from point A to point B to cause a physiological response

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3
Q

a collection of multiple neurons

A

a nerve

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4
Q

what makes up the structure of a neuron

A
  • dendrite
  • cell body
  • axon
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5
Q

what is the function of a dendrite

A

-receive stimuli from internal & external sources

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6
Q

what is the function of the neuron cell body

A
  • process stimuli/signal

- provide energy/nutrients

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7
Q

what is the function of the axon

A

to transmit signal to target tissue/structure

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8
Q

how many dendrites & axons does a neuron have

A
  • dendrites vary in number

- only one axon per neuron

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9
Q

what is the membrane that surrounds the axon of a neuron

A

myelin sheath

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10
Q

what is a myelin sheath

A

Multiple layers of a Bilayer of Phospholipids membrane

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11
Q

what produces the myelin sheath

A

Schwann Cells

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12
Q

what is the grey matter

A

area that contains cell bodies and dendrites

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13
Q

what is the white matter

A

area that contains axons with the myelin sheath

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14
Q

where is the grey matter found

A
  • cortex of brain

- central region of spinal cord

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15
Q

where is the white matter found

A

everywhere in nervous system

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16
Q

what is the function of the myelin sheath

A

Allows signals to move at great speeds along a neuron’s axon

17
Q

what are targets for a neuron

A
  • organ
  • muscle
  • glands
  • other neurons
18
Q

what origin points for neuron

A
  • muscles
  • organs
  • structure
19
Q

what are the characteristics neuroglial cells

A

~non-impluse conducting cells
~supports and binds neurons
-supply nutrients by connecting neurons to blood vessels

20
Q

what are some examples of neuroglial cells & their functions

A
  • Schwann cells: produce the myelin sheath
  • Astrocytes: function in blood-brain barrier
  • Ependymal cells: produce Cerebral Spinal fluid